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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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