Question

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Answer 1

Answer:

A) At. no. 10= Neon

At. no. 20= calcium

At no. 7 = nitrogen

At. no. 14 = silicon

B) group no. - 18 , 2 , 15 , 14 respectively

C) period no. - 2 , 4 , 2 , 3 respectively

D) neon - 2, 8

calcium - 2, 8, 8, 2

nitrogen _ 2, 5

silicon - 2, 8, 4

E) valency:- 0, 2, 3, 4 respectively

Answer 2

Answer:

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