Atomic Symbols, Atomic Numbers, and Mass Numbers
By Debbie McClinton Dr. Miriam Douglass Dr. Martin McClinton
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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Why is the letter A used to denote mass number?
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Comments
I believe the "a" represents an Atomic mass unit (amu): A unit used to express the mass of an atom equal to exactly one-twelfth the mass of a carbon-12 atom.
Answered by Tom Thiel on 3/20/2015 9:08:28 AM 0.00 Thumps Up Thumps Down -
Comments
A is the atomic mass number
Answered by Hillary Sazama on 9/2/2016 2:35:38 PM 0.00 Thumps Up Thumps Down
Why does symbol of mass number is given A
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Comments
the A stands for the amu, the atomic mass number
Answered by Hillary Sazama on 9/2/2016 2:37:02 PM 0.00 Thumps Up Thumps Down
I love the format - I would like to see more exercises.
Posted by Dee Shonkwiler on 10/16/2011 2:03:00 PM ReplyCreative Commons Attribution-NonCommercial 4.0 International License.