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Electronic Configuration
2
nucleus
1
3
4
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e
H
ATOMIC STRUCTURE
4
Atomic mass
2
Atomic number
number of
electrons
number of
protons
=
The sum of
protons and neutrons
in an atom
Number of Protons
in an atom
number of
neutrons
=
Atomic mass
Atomic number
-
Atomic mass
proton
-
Atomic mass
electron
-
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