1.

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Answer»

Answer:

1st line

Protons - 8

Electrons - 8

Neutrons - 8

2ND line

Eliment - ALUMINUM (Al)

MASS no. - 26.98154

Protons - 13

Electrons - 13

Neutrons - 14

3rd line

Atomic no. - 20

Neutrons - 20

Electrons - 20



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