Given below is the electronic configuration of A, B, C, D.A) 1s2 2s2 2

1.	Given below is the electronic configuration of A, B, C, D.A) 1s2 2s2 2p1a) Which are the elements coming within the same period?B) 1s2 2s2 2p6b) Which are the elements coming within the same group?C) 1s2 2s2 2p6 3s2 3p6c) Which are the noble gas elements?D) 1s2d) Which group and period does the element C belong to?
Answer» a) A and B belong to same period because the valence electrons of both the elements lie in the same orbit. b) Elements A and C and elements B and D. c) B and D are noble gas elements. d) C belongs to 3rd period (orbit number) and III group (Number of valence electrons).

Given below is the electronic configuration of A, B, C, D.A) 1s2 2s2 2p1a) Which are the elements coming within the same period?B) 1s2 2s2 2p6b) Which are the elements coming within the same group?C) 1s2 2s2 2p6 3s2 3p6c) Which are the noble gas elements?D) 1s2d) Which group and period does the element C belong to?

Answer»

a) A and B belong to same period because the valence electrons of both the elements lie in the same orbit.

b) Elements A and C and elements B and D.

c) B and D are noble gas elements.

d) C belongs to 3rd period (orbit number) and III group (Number of valence electrons).