Atomic Mass: How to Calculate Isotope Abundance
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- เผยแพร่เมื่อ 22 ส.ค. 2024
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How do you determine and calculate isotope abundance when you know the relative atomic mass (also known as atomic weight), as measured in amu or atomic mass numbers? Here we will go through the algebra and reasoning to figure out the amount of abundances of the isotopes, in percentages and in decimals.
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Atomic mass and atomic weight are the same thing--they are both the average mass of atoms of an element. It's mass number (not to be confused with atomic mass) that is the mass of a specific isotope.
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Lol at 5:39 when he emphasizes the value is negative..lol
+34.97x - 36.97x = -2.00x (he almost forgot the negative, thats why its stressed)
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What if there are 3 isotopes? how can we tackle that problem?
Hamza Ali tThere is not a question like that,unless they give u one of istope’s percentage
devid them by ther pirsent and then add them
@GT Talks True, finding the percentage is legit the purpose of the problem -_-
good question, i’m trying to figure that out right now too😅 my question is asking to find the abundance for 2 isotopes while i have the abundance of 1 and the atomic mass
@@valentinacastano589 that's super easy. It is done in the Same manner. But the third we be called different
Hey everyone, I'm here to help. If you have any questions or just want to learn more, click on the link in the description above. It'll take you to a page where you can ask me questions.
I would appreciate your assistance in solving this. Silicon has three stable isotopes, 28Si, 29Si and 30Si. The heaviest isotope has a percentage abundance of 3.1%. using the relative atomic mass from the periodic table, calculate the percentage abundance of the lightest isotope to one decimal place
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I am taking my general chemistry class and i wanna study in advance about the abundance of isotopes, wow just wow i understand what ur talking about, it just feel so different from just listening in class and the professor just keep talking and its all like non sense to me like ill never get to understand this topic. Thanks man, because of you i can answer all the question and recitation by studying in advance. Thank uu!
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TYLER!!!! This is so crazy that I'm finding you here talking about isotopes! I'm doing this course with Creative Live with my friend James Wedmore on TH-cam Marketing and I'm doing a keyword search on TH-cam for "abundance" because I'm coming out with a book on money in the fall...and I saw that relative abundance was a common searched term. And now here you are talking about it - but in a totally different way than I thought. Crazy freaking small world!
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I love your videos! Your method makes them so easy to understand. This is one that my professor gave me, but i am confuse. How can i use your method in this problem. Silver exists as two isotopes with atomic masses of 106.9041 and 108.9047 amu. Determine the average atomic mass for silver if the % abundance for each isotope is 51.82 and 48.18%, respectively. Can you show me with your method please? I would really appreciate it if you are available.
dude Idk what students would've done without you.
Hi Tyler, first thank u for the great explanation!
I have a Q which is how can I calculate 3 isotopes abundance. For example, calculate the three isotopes S-32, S-33 & S-34 and tell which of them is more abundant.
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Thank you so much, now I know how to solve for the % abundance. 💯
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what if you have 3 or 4 isotopes and there are no percent abundance given. the only given value is the average mass of the isotopes how will I solve it?
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Hi Tyler,
How do you know which isotope to set to x and which one to set to (1-x) when solving for the abundance?
it doesn't matter. you can do either one.
Tyler DeWitt Hi Tyler, What if you have 3 isotopes instead of 2. What does the third isotope become if we already have an (X) and a (1-X) attached to the first two isotopes?!?
Bruv I would've failed without you so tysm
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I'm completely stuck when it comes to finding the abundances of more than two isotopes. (Magnesium in this case) :( cant find any videos showing those
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If the question, for example asks, "A sample of Chlorine gas the same atomic mass stated on the periodic table. There are two known stable isotopes of Chlorine: Chlorine-35 and Chlorine-37. Calculate the percent abundance of each isotopes in the sample." How would I answer this question if it doesn't tell the atomic mass of Chlorine 35 and 37?
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That moment when your midterm has the exact same question as example #2 and you remember how to do it!
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