2.9a - atomic mass, A – The number of protons plus the...

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Unformatted text preview: atomic mass, A – The number of protons plus the number of neutrons in an atom. isotopes – Atoms of the same atomic number that have different numbers of neutrons. atomic weight – This is not a weight! It is the weighted average of the atomic masses for all isotopes of an element. This is why the atomic weight of carbon is 12.011 and not 12.00. (Most carbon is C , however about 1.1% of naturally occurring carbon is C ) 13 12 ...
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This note was uploaded on 12/12/2009 for the course ENGN 10 taught by Professor Wendy during the Summer '05 term at City College of San Francisco.

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