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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  • @jah2277
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  • @tdewitt451
    @tdewitt451  11 ปีที่แล้ว +27

    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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    @theplanetdestroyer 9 ปีที่แล้ว +65

    Lol at 5:39 when he emphasizes the value is negative..lol

    • @kingcuber7796
      @kingcuber7796 5 ปีที่แล้ว +4

      +34.97x - 36.97x = -2.00x (he almost forgot the negative, thats why its stressed)

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  • @dahazz
    @dahazz 8 ปีที่แล้ว +62

    What if there are 3 isotopes? how can we tackle that problem?

    • @saraye17
      @saraye17 5 ปีที่แล้ว +6

      Hamza Ali tThere is not a question like that,unless they give u one of istope’s percentage

    • @thetrillionairelife5504
      @thetrillionairelife5504 5 ปีที่แล้ว

      devid them by ther pirsent and then add them

    • @nehanair3580
      @nehanair3580 4 ปีที่แล้ว

      @GT Talks True, finding the percentage is legit the purpose of the problem -_-

    • @valentinacastano589
      @valentinacastano589 3 ปีที่แล้ว

      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

    • @pullingthestrings5233
      @pullingthestrings5233 3 ปีที่แล้ว

      @@valentinacastano589 that's super easy. It is done in the Same manner. But the third we be called different

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    @tdewitt451  11 ปีที่แล้ว +10

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    • @motelioobadiah9832
      @motelioobadiah9832 11 หลายเดือนก่อน +1

      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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    @delmymartinez7981 8 ปีที่แล้ว +1

    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.

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  • @ameeraalsaqqaf9309
    @ameeraalsaqqaf9309 9 ปีที่แล้ว +11

    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.
    Regards

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    I’m so thankful for this video.. I have a chemistry test tomorrow and I had no idea how to do this.

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    @kristelmaefortes8420 5 ปีที่แล้ว +5

    Thank you so much, now I know how to solve for the % abundance. 💯

  • @hayschan1437
    @hayschan1437 9 ปีที่แล้ว +1

    The video helps me a lot. Chemistry teachers in my school make the calculation complicating. Really thx a lot. I know how to complete questions with simple and straightforward methods.

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    @chrissys7645 7 ปีที่แล้ว +1

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    @jackgrainger2572 8 ปีที่แล้ว

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  • @AD_D40
    @AD_D40 8 ปีที่แล้ว +12

    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?

    • @rubiegorospe5553
      @rubiegorospe5553 7 ปีที่แล้ว

      How to Fоrcе the Universe to Maаnifest Yоur Dream Life twitter.com/2b221f57eb75c29b8/status/804630629388152832 Atomic Maaass Hоw to Calculate Isoоootope Abundance

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    @otomini429 ปีที่แล้ว

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    @GtotheJay7 12 ปีที่แล้ว +2

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    @ferdsmand_ 5 ปีที่แล้ว

    I like the way he teaches Chemistry - Directly to the point.

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    @angelinoz5159 7 ปีที่แล้ว +1

    Mr. Dewitt thank you so very much for this tutorial. My concepts are so clear. Could you please do a series on A levels Chemistry syllabus topic wise tutorials? Bless you

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    @harryosayande8709 6 ปีที่แล้ว

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    @edenhab2113 3 ปีที่แล้ว

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    @arielweinstein6476 7 ปีที่แล้ว

    I have this exact question in one of my worksheets. I have a test tomorrow, and this seriously made me feel so much better!

  • @Walkingdeadman104
    @Walkingdeadman104 7 ปีที่แล้ว +2

    I love how excited he got when he forgot to put the negative before the 2.00

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    @victorvaca7429 8 ปีที่แล้ว

    Thank you so much. I paused the video for the second equation and i did it all by myself. Im so proud. Thank you for teaching us Tyler.
    -Victor

  • @chessmaster3297
    @chessmaster3297 3 ปีที่แล้ว

    Thank you so much for the break down and slowing down so I can understand.

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    @anjaybruss 12 ปีที่แล้ว

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  • @brokenharpchannel3537
    @brokenharpchannel3537 11 หลายเดือนก่อน

    Thank you. I explained it better to me than my own chem professor

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    @thearchangel2142 6 ปีที่แล้ว

    I love chemistry - even though it is hard - you make it a lot easier in bits I don't understand. Thanks!!!

  • @brittneywilson3369
    @brittneywilson3369 10 ปีที่แล้ว +6

    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?

    • @tdewitt451
      @tdewitt451  10 ปีที่แล้ว +16

      it doesn't matter. you can do either one.

    • @CR1257
      @CR1257 7 ปีที่แล้ว +1

      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?!?

  • @user-hd2tx6fx3e
    @user-hd2tx6fx3e 8 หลายเดือนก่อน

    Bruv I would've failed without you so tysm

  • @Bellabear1717
    @Bellabear1717 10 ปีที่แล้ว

    Thank you so much!! You've perfectly explained a concept that my professors could not. Keep up the great work!!

  • @spurstrophies4974
    @spurstrophies4974 10 ปีที่แล้ว +9

    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

  • @mohammedx45
    @mohammedx45 8 ปีที่แล้ว +1

    possbily the best teacher i've ever seen!! thank you so much!

  • @realbeastmaster64
    @realbeastmaster64 7 ปีที่แล้ว

    watching this a day before my final ahaha would be a lost cause without you

  • @ggutierrez18
    @ggutierrez18 6 ปีที่แล้ว

    Thank you for this!! My chemistry teacher is not the best in teaching and you helped me a lot!

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    @SaraKhan-sm4py 8 ปีที่แล้ว +1

    i want ur more videos regarding to the chemistry.... u explain very well..so can u send me ur link?

  • @TheReal_Poochie
    @TheReal_Poochie 10 ปีที่แล้ว +2

    You're amazing for explaining that so clearly! Thanks!

  • @googleaccount5072
    @googleaccount5072 3 ปีที่แล้ว +1

    Thank you so muchhhh this definitely helped sooo much ❤ Hope you have an amazing day ❤ God bless you !!!!

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    @mathiassalvatory4094 8 ปีที่แล้ว

    always a new thing is learnt as i check your videos. thank you very much

  • @Cindy99765
    @Cindy99765 7 ปีที่แล้ว

    Thanks so much. I didn't really understand this in class and some other videos weren't very helpful.

  • @DanielHernandez-mx6zk
    @DanielHernandez-mx6zk 7 ปีที่แล้ว

    Hey man thanks an bunch for these videos this is the second one I've seen. I'm taking a Gen Chem class and so far this has been major help. Just wanted to let you know you're greatly appreciated.

  • @lolitalosity143
    @lolitalosity143 8 ปีที่แล้ว +56

    You should be my teacher

    • @arwa.s5212
      @arwa.s5212 7 ปีที่แล้ว

      Аrе Yоu Оn Тhe PРath То Ultimаte Life Suсcess? twitter.com/99b8dbff099e6c65e/status/822777137924931585 Аtоmiс Mass Hоw tо Calсulаtе Isоtopе Аbundаnсe

  • @juliegeorge1995
    @juliegeorge1995 3 ปีที่แล้ว

    Tyler, you are a wonderful teacher.

  • @ethansmurthwaite7802
    @ethansmurthwaite7802 2 ปีที่แล้ว

    This is the most amazing explanation in the world. Thank you so much.

    • @tdewitt451
      @tdewitt451  2 ปีที่แล้ว

      Thank YOU! I’m glad you like it!

  • @suzannach9833
    @suzannach9833 7 ปีที่แล้ว

    Absolutely outstanding skills to explain! I shall succeed in my Chem class thanks to your videos! Thank you

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    @ahmedrashid7652 6 ปีที่แล้ว

    Wow I was having so much problem in this and this video made me understand it so well, you did an amazing job.

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    @ekenejustice9594 8 ปีที่แล้ว

    Tyler, you are a good teacher.

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    @nini5ghu283 ปีที่แล้ว +1

    I love u ur teaching is amazing and so clear ur a miracle.

  • @katemilne1643
    @katemilne1643 7 ปีที่แล้ว

    thank you so much for this video!! had no clue what i was doing until i watched it- great explanations :)

  • @stephenjacksonsinkala8476
    @stephenjacksonsinkala8476 6 ปีที่แล้ว

    Dr Tyler you are powerful,i really like the way you solve chemistry problems thanks a lot you are helping me

  • @ThePittas
    @ThePittas 9 ปีที่แล้ว +2

    Thanks again man, you're a life saver.

  • @vishu1334
    @vishu1334 ปีที่แล้ว +1

    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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    @joannerios8725 8 ปีที่แล้ว +1

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    @OffWithReligion 8 ปีที่แล้ว

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    @1004088g 9 ปีที่แล้ว

    You saved my life. Thank you for clarifying the subject.

  • @MH-fq4vy
    @MH-fq4vy 7 ปีที่แล้ว +2

    omg i tried figuring this out for half an hour straight... and now i get it in less than 15

  • @alexandraquino8649
    @alexandraquino8649 ปีที่แล้ว +1

    This was very helpful, thank youu Tyler! :)

  • @yamc9710
    @yamc9710 8 ปีที่แล้ว +1

    Thanks so much for the detailed vid! This really helped me for a test :)

  • @Ps3COD4Fan
    @Ps3COD4Fan 10 ปีที่แล้ว +2

    That moment when your midterm has the exact same question as example #2 and you remember how to do it!

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    @johndoe-oj7xk 7 ปีที่แล้ว

    You're the best. Really appreciate what you did here my dude. Helped me a lot