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Flashcards in The Atom Deck (5)
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1

Proton

Location: in nucleus
Mass: 1 unit
Charge: +1

2

Neutron

Location : in nucleus
Mass: 1 unit
Charge: 0

3

Electrons

Location: outside nucleus
Mass: 2,000 times smaller than proton
Charge: -1

4

How to calculate number of neutrons

Mass number - atomic number

5

Isotopes

Atoms with the same atomic number but different mass numbers