Question

Electronic configuration of some elements are given below. Analyse them and answer

the following questions

A – 2,8,7

B – 2,8,8

C – 2,8,1

D – 2,8,3

a) Which of these show the valency ‘ 1 ‘ ?

b) Which is a noble gas?​

Answer 1

Answer:

a) ans.is C

b)ans.is B

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