Question

d) Moving left to right in the second period, number of
valence electrons............
e) Moving down in the second group, number of velence electrons...............​

Answer 1

Answer:

(d)As we move from right to left in any period valence electrons decreases. Period is completed when a particular shell is completely filled in that period. Hence as we move from left to right, number of valence electrons increases and vice versa for the right to left i.e. number of valence electrons decreases.

(e)Remains same. All element in Second Group have 2 valence electrons.

Answer 2

Answer:

d- increases from 1 to 8

è- remain same