Question

. Electronic configuration of elements P,Q,R,S are given below. (Symbol not real)

P - 2,2

Q - 2,8,2

R – 2,8,5

S - 2,8

a)Which among these elements are included in the same period? 1

b) Which are those included in the same group? 1

c)Which among them in noble gas?​

Answer 1

Answer:

a) Q and R

b) P and Q

c) S

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