chem atoms 2
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Last updated 3:45 PM on 11/13/25
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9 Terms
1
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atomic number
number of protons in element
ALWAYS a WHOLE number
liked to a social security number
2
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neutral elements
number of PROTONS = number of ELECTRONS
NO charge
3
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never changes
number of protons….
4
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atomic mass
bottom number given on element
will have a DECIMAL
weighted average of all the element’s isotopes
5
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mass number
number of protons + neutrons combined
ALWAYS a WHOLE number
6
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neutrons
mass number - atomic number = number of…
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isotopes
atoms with the SAME number of PROTONS, but DIFFERENT number of NEUTRONS
chemically alike
have different mass numbers
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mass number
protons + neutrons
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formula
atomic number = protons = electrons
Note 
Flashcards (24)