Question

14. The electronic configuration of two elements X and Y are 2, 8, 7 and 2,8,8,3
respectively. Calculate-
(a) Atomic number of X and Y
(b) Group number of X and Y
(c) Period number of X and Y​

Answer 1

Answer:

Explanation

Atomic no.

A=17

B=21

Group no.

A=17

B=13

Period No.

A=3

B=3

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