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Atomic Symbols, Atomic Numbers, and Mass Numbers

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Learners read definitions of atomic symbols, atomic numbers, and mass numbers and then answer questions about the number of neutrons, protons, and electrons in select elements.

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Posted by Robben Nacimento on 3/20/2015 12:58:49 AM Votes 0.00 Thumps Up Thumps Down

Why is the letter A used to denote mass number?

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Posted by Ashutosh Karn on 2/12/2016 7:58:44 AM Votes 0.00 Thumps Up Thumps Down

Why does symbol of mass number is given A

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I love the format - I would like to see more exercises.

Posted by Dee Shonkwiler on 10/16/2011 2:03:00 PM Reply

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