Chemistry
For Chemistry Discussions
1,617 topics in this forum
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Hello, we did an experiment of heat of neutralization. The objective is to calculate the molar heat of neutralization we are using calorimeter to determine the heat transferred and hence the heat of neutralization, DeltaH ( rxn) we have 2.00M NAOH and 2.00M HCL . and collected 25 mL of each solution. My question here is how do you calculate the above? I need a gerneal sense of idea of what to do, and it's due tomorrow. I'm keeping my cool and calm to not freak out and so far it is working here with you people. You guys are very helpful. I also want to know for the calculations part, how do you calculate the mass and temperature if we are using 3 different trials with…
Last reply by Lola234364, -
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Hi, so my topic for the chem IA is current "What is the effect of the iodine numbers in different oils and fats on the properties of soap they are made into?". I am finding the iodine numbers of grape seed oil, sunflower oil, lard, butter and olive oil and comparing these values to the state of matter that the soaps made out of these oils are (which I am finding from an online database). In that, with talk about unsaturation I can only find a connect to how soft or hard the soap will be from my previous knowledge in IB bio/ the biochemistry part of the chem textbook, nothing on sensitive skin or effectiveness of soap which is what I really wanted to talk about. Is this go…
Last reply by Maggie_Dora, -
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I'm sure that by now you've all read my previous post about my YouTube channel. https://www.youtube.com/channel/UC8lJSSlRyIBs8pYhQBnCOIA I've now made a website that features all my videos in one easy to access resource. http://www.msjchem.com/ There are videos for complete old syllabus (last exams 2015) and I'm in the process of making new videos for the new syllabus (first exams 2016). Also videos for option B (SL and HL), option E (SL and HL) and option F (SL only). Perfect for the upcoming November exams!
Last reply by sarahaction, -
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Hi again. for my chemistry ia im very interested in doing catalytic decomposition of hydrogen peroxide with different catalysts but my teacher said that that rate of reaction is too hard to measure. however i read up on some similar past ia examples and they all managed to get a good score. so i dont understand why she said it couldnt be done. please if there is an efficient way to collect data on the rate of decomposition of catalytic decomposition of hydrogen peroxide, give me some ideas and feedback. Thank you!
Last reply by sarahaction, -
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Hello so as the teacher advised me to consider carefully about my IA experiments, I would like to do an experiment about medicines. Could you please suggest me some good experiments about them? I thought about the synthesis of aspirin but the teacher said that it takes too much time. Also, since aspirin hydrolysis is already done by another student, it is preferable to avoid this topic. Thanks for your attention!
Last reply by sarahaction, -
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Hi everyone, I just picked my Chemistry IA topic which is the effect of pH on water absorbing properties of hydrogel. Can someone give me suggestions on how to design the experiment? Ideas on how to measure the swelling rate or how to control the pH? My main problem is not knowing how to control the pH since I do not think I can soak hydrogel in solutions of different pH as they would soak up the water in solution too. Lastly, does anyone know where to buy commercial hydrogel as I can't seem to find any online? Or should I just settle for any hydrogel I can get my hands on? Thanks!
Last reply by HenryFrank, -
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Hi, I am deciding my topics for the extended essay in chemistry and was thinking of doing something around -: - The effect of pH on the hydrolysis of aspirin or - The most effective endothermic reactions to be used in instant cold packs. (currently used water and ammonia) Please give me feedback as to how I could improve my topics and any changes that I could make to make it more suitable to the real world.
Last reply by rraval10, -
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I want to analyze how (storage) temperature affects the pH of orange juice. My teacher told me to narrow it down to a specific chemical found in orange juice so i was thinking citric acid. unless vitamin c would be better? but i was thinking to just make citric acid solutions by myself with the crystals. I’ve heard mixed emotions about this topic; some that it’s too basic and others that it’s good. someone told me that it’s too basic because “any fifth grader could measure pH” but it does require calculations. not sure of which yet bc I just got introduced to the IA.. any ideas on what i’d need to calculate? and if it’s a good topic? i need to have it approved by friday.…
Last reply by d3mb, -
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Hey, I am planning to do my Chem IA on temperature having an influence on the amount of iron extracted from soybeans. Is there a good method to extract iron from soybeans? I was planning to use strong magnet to pull iron out of the soybeans but it seems very unprofessional. Thanks.
Last reply by Jason1211, -
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Hello! I'm staring IB in a month and was wondering what to study for chemistry HL. In myp nothing was really explained, and I forgot most of whatever had been taught anyways.. practical report writing isn't too good either (average 5 in myp). I have started revising previous textbooks, but not sure if it is actually beneficial. Any advice would be greatly appreciated, thanks !
Last reply by ryushii, -
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Hi, for a lab project, I'm doing a simple titration of aspirin. Question is: What is effect of different mass of aspirin pills on the purity of the tablet? I bought some aspirin from the store (low dose, regular, extra strong) and they all have different masses. Low dose is lightest, high dose is heaviest, obviously. The mass (grams) is not listed on the package, so I have to actually weigh it myself and record it. How would I put that in a raw data table? Would the conditions be listed as low dose, reg, high dose, or just listed by the mass (g) as measured? Also, for each trial of the conditions, would I have to weigh the tablet again? Thanks guys!
Last reply by hlsciencenerd, -
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Hi guys, I am struggling with the evaluation part of my Chemistry IA. I had an acid base titration as my experiment with HCl and NaOH. I had HCl in a conical flask and I was slowly adding NaOH with a burette. But sometimes I "overshooted" the NaOH, where I ended up pouring in too much NaOH than necessary. I was wondering if this is a random error or systematic error? I did get better with being more accurate with how much NaOH I added, so it's definitely not consistent how much I "overshooted". Thats why I thought it would be a random error, but idk anymore.
Last reply by indimpi, -
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Hi everybody I am on my summer holiday right now and I have pretty much written my whole IA up to the results section but i just realized i am not really measuring anything... My idea was to extract anthocyanin from blueberries and then titrate it with quinine (tonic water) at different temperatures to see the change in color. My idea came from my aunty who makes colour changing gin when tonic is added. As I researched i found that it is the anthocyanin in the plant that reacts with the more basic tonic water and so pH changes therefore the colour changes too. I would apply the conclusion of what temperature reacts the fastest to cocktail making. As you can tell i h…
Last reply by Emmvanschouwen, -
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Does the IA topic "To study the changes in the iodine value of edible oils such as olive oil, flax seed oil, coconut oil, canola oil and rice bran oil on subjecting the il to heating and reheating at various temperatures." make good sense. I'm trying to link iodine value to nutritional value. Would appreciate any help in putting this together. I'm confused because they now say saturated fat such as coconut oil is better for health and it has a low iodine value. They say higher the iodine value, higher the unsaturation and better for health...so a little direction would help in streamlining the experiment. Thanks
Last reply by nishee, -
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Hi I need help in choosing another chem IA. This is because my last chem IA idea did not work (How does changing the concentration of water using sodium chloride affect the enthalpy change of hydration copper (II) sulfate?). This is a shame as I feel that the way I wrote this chem IA was really good. Here are some ideas that I have come up with/found and I was wondering which ones are suitable to get me a high 6/7. Use different acids to see which is most effective at catalyzing the esterification of propanoic acid Effect of temperature on enzyme activity. Monitor the rate at which amylase breaks down starch into maltose at various temperatur…
Last reply by Enterbot3, -
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Hi there, I'm really struggling with topic 1 stoichiometry and I really need help! Will you please help me with the following 3 questions? 1. 5.0dm3 of 2.00mol dm-3 sodium carbonate solution, Na2CO3 (aq)was added to a volumetric flask and the volume was made up to 500 cm3 with water. What is the concentration in mol dm-3, of the solution? 2. How many grams of sodium azide, are needed to produce 68.1dm3 of N2 (g) at STP? Molar V at STP = 22.7 dm 3 mol-1 ; Mr(NaN3) = 65.0 2NaN3 (s) → 3N2 (g) + 2Na (s) 3. 2.478g of white phosphorous was used to make phosphine according to the equation: …
Last reply by kw0573, -
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Hello, I am trying to complete a chemistry database and have been trying to look for a Chem topic for 4 weeks now. I missed the rough draft due date since I've been trying to search for a good interesting topic for so long when I finally came to this. Is there a correlation between bond angles and reactivity of a molecule? Unfortunately, I haven't been able to get much information out of this yet. Is there a correlation? If not, I could change it so it's "effect of bond angles on boiling point" or something like that. What do you think?
Last reply by kw0573, -
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Hello, I'm a grade 11 IB student, and i need help finalizing my IA topic. I have my brief layout planned out. I am trying to find out the time we need to brush minimum to get clean healthy teeth. As a substitute for organic toothpaste, I'm using sodium bicarbonate, and then to create a similar reaction like we touch the brush to out mouth, I'm planning to titrate it a fruit juice and then trying to neutralize it, although I don' know if it makes sense. The indepent variable will be the time exposure of the titration of both, and dependent variable will be the effectiveness of the neutralization, although im trying to figure out how to do that. Can anyone pleas…
Last reply by ib_practicer, -
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Hi, I am currently in the process of selecting a chemistry IA topic. I want to do something in the realm of environmental science. So far, I have the idea of investigating the effect of benzolphane on the bleaching of corals? Is there any way to replicate that in a lab setting, and in regards to chemistry concepts? Or, are there any other ideas around this topic? Thanks!
Last reply by mads1171, -
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My internal chemical research is to evaluate different concentrations of lactic acid in calcium carbonate to determine its demineralizing effect, however I have only determined to measure the molar mass before and after and now I have no idea what dependent variable to include should I modify anything ? Is the subject simple? What should I do to improve it?
Last reply by Milagros, -
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I'm an SL Chemistry student and I've been struggling to find an idea that is easy enough to investigate in order to obtain interpretable results and difficult/complex enough to show further critical thinking and thorough application of chemistry. My initial idea was to use a simulation to figure out how the electronegativity of a nucleophile (such as the hydroxide ion, cyanide ion and ammonia) affects its bond length when it undergoes a SN1 reaction with a tertiary halogenoalkane. However, after writing up the intro, hypothesis etc. and moving onto the actual simulation work, I could figure out what simulation was appropriate and I could even use to begin exploring this t…
Last reply by Teresawerner, -
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Hi, I'm doing an IA on medicinal chemistry and how the structures properties affect absorbance. but i can't find any absorbance data Can someone help me to find some numerical data to make graphs, or help brainstorm ways to showcase data. warm regards, Keirra M
Last reply by keirramudhray, -
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How can I justify my interest in this topic? I've written about the importance of milk and calcium in the diet and everything but i'm not sure what to say as like a personal thing. Don't mind making something up I also have to justify the temperature at which I heat the milk to. I'm not sure how I should do this
Last reply by godhelpme, -
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Hello, I decided to do something with rate of evaporation of alcohol solutions for my Chem IA but my teacher told me that this experiment is too simple for the IA. I'm not sure what kind of adjustment can make this 'not too simple' for IA topic.
Last reply by BookHerondale, -
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so my teacher have disapproved my chemistry IA atleast twice so i need some guidance about my IA ideas related to fertilizers thanks.
Last reply by exhaustedpotato, -
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Hello. For my chem IA, I want to do how toothpaste (NaF) neutralizes the acid in our mouth to prevent tooth decay. My model teeth is calcium carbonate, and I was going to add HCl and different amounts of NaF powder to see how HCl and calcium titration (tooth erosion) changes. However, when HCl and NaF are added, instead of neutralizing, it creates NaCl (which is not a problem) and HF (which is an acid....) Can anyone help me? Thank you.
Last reply by AAA22222, -
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I just started SL Chemistry and my teacher has almost no training in chemistry. He hasn’t given us a syllabus and it’s been four weeks into school. I think my school offers ESS with a great pass rate, but I would like to study physics and I think I’ll stick it out...even though almost no one passes the IB Chem exams. i want to start now and get any textbooks or note taking guides you guys might have. My teacher is not helping at all, I am quite in need of help. Thanks, Crumbling-IB-Stduent
Last reply by Crumbling_ib_student, -
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Hi, so I've been working on my chem IA about Esters. However, I am unable to collect quantitative results. Can someone please link an IA about esters or some online results that may help me.
Last reply by jimmybdh, -
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Does anyone know any websites or videos that can help me with chemisry, both SL and HL part? Some basics as well since I was sick from school for weeks when we were learning the basics.
Last reply by Colourflame, -
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Since, I cannot find out anything interest to me in chemistry SL. I want to write my IA about How does alcohol (or specific name of the element) affects to human brain/body ? I dont think it is adequate topic. If you know further informations please reply.
Last reply by KamranAbb, -
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Hello Ive just started the IBDP program, and I am currently taking physics SL for my experimental science subject. Although I did okay with topic one (was sometimes confused in class though was able to understand with revision) . I am not good at maths, and am aspiring to study psychology in the future. SHOULD I change to chemistry SL instead of physics SL, considering how apparently chemistry has somewhat easier maths than physics? What are the differences among these subjects? If I’m bad at math, should I not take physics SL?
Last reply by ybna, -
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My sl chemistry exam is coming up in a few weeks, and I´m really struggling with studying. I started studying(wrote notes following the syllabus, read the textbook, watched a few videos, did multiple choice questions) a few weeks ago and have already gotten through most of the topics. However, whenever I try a past exam or questions in the textbook´s chapter review, I just can´t seem to do it. I seem to just completely forget whatever new information I learnt the day before, or how I´m supposed to solve certain problems. I´m starting to feel stressed since my exams coming up soon, and wanted to know how others studied for their chem exam. What worked and what didn´t? …
Last reply by BookHerondale, -
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Hi all! I am currently a pre-IB student, but I was notified yesterday that I have to submit my preference for either bio SL or chem SL for next year's diploma program. I'm having difficultly choosing between the two because I don't know much concrete information about either program. I, for sure, plan on majoring in something pertaining to STEM later on (specifically, I have been interested in biomedical engineering). The chem SL program focuses heavily on medicinal chemistry, whereas bio SL focuses most on ecology in my school. It's difficult for me to define myself as a more "math-sy" person or one who likes memorizing more in science because I don't have a prefere…
Last reply by BookHerondale, -
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For my IA, I'm trying to find the activation energy of a glowstick reaction (phenyl oxalate ester + hydrogen peroxide). Using the Arrhenius equation and the integrated rate laws, and using this link as a guide (https://www.westminster.edu/about/community/sim/pdf/SLIGHTSTICKKINETICS_001.pdf), I was able to come up to a certain point. I have two questions. In the link, I see that it used first-order kinetics in order to create an equation that relates rate of reaction to temperature (with activation energy/R being the slope). However, as far as I know, first-order kinetics only applies to chemical reactions with one reactant. I then looked at another source, which brea…
Last reply by kw0573, -
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For the following question: Which molecules react to form a dative/coordinate bond? A. CH4 and NH3 B. C2H2 and Cl2 C. NH3 and HF D. Cl2 and HF The answer scheme says C is correct, but I do not see how two already complete molecules can form coordinate bonds. NH3 has a lone pair of electrons, HF having none. How can a coordinate bond between this lone pair and HF happen? I am confused. The others are also equally confusing.
Last reply by kw0573, -
- 1 reply
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I am studying for chemistry HL for the IB For the following question, I do not know why A is the answer Which statement about isotopes is correct? A Isotopes have the same molecular formula but a different structural formula B Isotopes of atoms of the same element have the same electron configuration The answer says A is correct. I do not know how isotopes can have a "molecular formula" when they are just atoms/ions. Moreover, for B, I initially thought this was wrong since isotopes can be ions as well, so it wouldn't always have the same electron configuration, but the question reads: "Isotopes OF ATOMS of the same element...." which would mean …
Last reply by kw0573, -
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My SL Chem IA is about the number of potential oxidation states of a transition metal effecting its catalytic ability in the reaction between sodium thiosulfate and iron(III) nitrate solutions. My question is, I'm not sure if I should be looking at just common potential oxidation states, eg. Iron +2 and +3, or include unusual ones, eg. Iron +4 and +5. Will transition metals be reduced/oxidized to any unusual/rare states as catalysts in this reaction? Thank you!
Last reply by Hannah__, -
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I was reading through some past chemistry IA examples and found a research question that I thought was really interesting and quite unique. I was wondering if it would be okay for me to use the same research question and essentially the same procedure, or would that be plagiarism?
Last reply by kw0573, -
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Hi, My teacher and I came up with a question which we thought was suitable. I was wondering whether this could get me a level 7. Using Hess’s Law – Measure the enthalpy changes for the dissolving an anhydrous and hydrated salt (such as copper sulfate or cobalt chloride) in order to work out the enthalpy for the hydration process. My independent Variable: Oxidation states of metals. i.e copper (I) sulphate, Copper (II) sulphate cobalt (I) chloride and cobalt (II) chloride (the roman numeral indicates the oxidation state of the metal. Varying the mass of each oxidation state of metal in hydrated salt. My dependent variable: The enthalpy change of…
Last reply by Enterbot3, -
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My Chemistry IA topic is focused on determining the calcium in milk by using the edta method (actual research question: How does the concentration of the calcium ion content relate to the temperature of the cow milk by using the EDTA titration method?) and I want to express my interest for my personal engagement. I am already doing research about the Calcium and EDTA things and the importance of Calcium and Milk in diet.
Last reply by kw0573, -
how to prepare for medicinal chemistry to get a 7 do the options that you choose matter for university
Last reply by Tharun, -
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- 408 views
Hi For my chemistry IA, I am looking towards investigating the Nernst equation but I am not sure what to investigate. Are there any ideas?
Last reply by Enterbot3, -
My chemistry IA investigates the different activation energy of the decomposition of H202 with Lead oxide and manganese oxide. My teacher told me to plot 1/Temp against Ln x 1/ Average Time taken but not how to actually calculate Ea. How do I get the activation energy if I have the time it takes for the percentage of oxygen to rise by 15% at 5 different temperatures and have it plotted 1/Temp against Ln x 1/ Average Time taken using the Arrhenius equation.
Last reply by kw0573, -
- 4 replies
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Hello! I think you might be familiar with the Briggs-Rauscher reaction, where you mix 3 solutions and then they do oscillate between colorless-yellow-dark blue for a couple of minutes. I thought this kind of reaction would be quite useful for measuring the effects of temperature over the duration of the oscillations, because we were supposed to investigate a factor that might had an effect over kinetics. Right after you mix the solutions, they turn into a yellow color, then blue, clear, yellow, blue... So I decided to measure the time it takes for the solution to undergo the cycle blue-clear-yellow, and I restarted the chronometer the moment the solution turned into blu…
Last reply by catlover101, -
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- 474 views
My chemistry IA is changing the concentrations of hydrogen peroxide in the briggs rauscher reaction to find the effects on the rate of reaction. I have readings of oscillatory time period, a graph and everything. Problem is, I have no idea about how to find the actual rate of reaction, I thought I could draw a conclusion by just comparing the time periods on the graph or something. I looked at a bunch of youtube videos, and i'm still super confused, nothing really gives me a concrete answer as to how exactly am i supposed to do this. Please please please help me out.
Last reply by catlover101, -
- 1 reply
- 465 views
Hello everyone, I want to do a chem IA on the effects of increasing the voltage on the yield of Copper gotten through electroplating but that seems like a generic idea which everyone might have. Do you think that it's generic? If so, what can I do to make it more "original"? Thank you in advance
Last reply by Certified_IB_Cultist, -
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- 526 views
Hi guys, I just wanted to ask if you think these topics are suitable for my Chem HL IA: -Either the pH change of water over a period of time and how it is affected by the temperature -The rate of reaction of glowsticks at different temperatures(Using a light sensor). I would be open to suggestions on titration reactions that I could do. Thanks in advance
Last reply by IBstudent8888, -
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I need to start getting solid with my IA topic but right now I am just brainstorming ideas and wanting to hear some ideas from peers. So far I only have around three ideas but are fairly common and perhaps not HL worthy: 1) Calcium content in different types of milk ( not sure how to do this one but interested, wondering if I should use the milk of different animals or different processes and procedures) 2) Enzyme and substrate relationship on how changing the amount of substrate would affect the enzyme activity and perhaps the pH as well? ( Biological catalyst, a bit worried that this is too biology, thinking about using catalase and hydrogen peroxide but …
Last reply by Colourflame, -
- 1 reply
- 562 views
Which table or section in the data booklet do you use to find the enthalpy of atomization and the lattice enthalpy??
Last reply by kw0573, -
- 2 replies
- 460 views
I´ve started studying for the chemistry exam and was wondering if understanding the ¨NOS¨, ¨applications and skills¨, and the ¨understandings¨ written at the beginning of each textbook chapter would be enough to do well on the exam. There´s some extra information throughout the chapters that´s not part of any of those categories (for example in 2.1 they talk about radio isotopes being used in nuclear medicine and they give specific examples, but that´s not part of the understandings, NOS or applications and skill). Would that sort of ¨extra information¨ be asked on the exam?
Last reply by kw0573,
