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How to do average atomic mass Videos

Average Atomic Mass: Why are there decimals on the periodic table?

Mr. Key uses average atomic mass to explain why the mass number on the periodic table has a decimal. Please note that all questions, comments and critiques ...

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Caitlin Elmasri commented on 21 Apr 2015
This is the only thing that made any kind of sense online. It helped me soooo much 

Intro to Chemistry: 2.3 Isotopes and Average Atomic Mass (1/2)

Join award winning teachers Jonathan Bergmann and Aaron Sams as they interactively teach Chemistry: 2.3 Isotopes and Average Atomic Mass.

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Pete Weeds commented on 26 Sep 2011
thanks for making these videos only problem is I forget to watch them and the last post was 2 months ago and the one before that was 11 months ago... that was a long time ago
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HIYAHprod commented on 21 Oct 2011
he looks like mr.bean when he is in the store
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Armin Behzadpour commented on 18 Oct 2010
15+8=23, 23 Divide by 2 is = 11.5 lol....
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Kris Knox commented on 11 Feb 2013
these are helpful thank you

Isotopes and Average Atomic Mass

The following video is on isotopes and calculating average atomic mass of various atoms. For more science and math podcasts search Papapodcasts in iTunes.

User Comments

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MultiPlacencia commented on 05 Oct 2010
I hate how people say they don't learn crap from their teachers!! People rush to these videos to make up for ALL that time they didnt payt attention in class for.... good vid :)
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Maria Steen commented on 28 Feb 2012
will all due respect, please speed up!! it helped lots, but it would have been much better without the abundant pauses and repetitions :)
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fokGoogol commented on 16 Jan 2011
@Matthew2649 : Obviously, no one taught you the world is larger than just English speaking nations, mkay? Have some respect.
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Yolo Conolo commented on 09 Feb 2011
Can u explain what the difference between average mass and weighted average mass?
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Jenny Franzen commented on 01 Jun 2011
ur from canada im guessing
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elvisreturns666 commented on 19 Jan 2012
Great video!!!
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Gama Isora commented on 09 May 2012
I GOT UR BACK
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thisnamehas18letters commented on 23 Nov 2011
mkay? :P
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Gama Isora commented on 09 May 2012
IDIOT

Isotopes - calculate the average atomic mass

A sample of chlorine has two naturally occurring isotopes. Isotope Cl-35 (Amu= 35.0) makes up 75.8% of the sample and Isotope Cl-37 (amu= 37.0) makes up ...

AP Chemistry - Isotopes and Average Atomic Mass

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