Question

a.number of valance electron of different elements in the same group b.number of shell of element in same period​

Answer 1

Answer:

(a) (i) In the same group, all the elements have same number of valence electrons, Group number of an element (up to 2 valence electrons) = no. of valence electrons Group n. of element (more than 2 valence electrons) = 10+ Valence electrons.

(b) 1.As we move down a group, the number of shells of elements increase by 1. 2. on moving from left to right in a period, number of valence electron of elements will increase.