Chemistry, asked by sehgalmilan29, 9 months ago

give name, symbol, atomic number of element 1 to7 period of last and first element

Answers

Answered by sona972

0

Explanation:

Hydrogen. H -1,

Helium. He-2

Lithium Li -3

Beryllium Be -4

Boron B-5

Carbon. C -6

Nitrogen N -7

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