Question

On going through the modern periodic table it is seen that the elements Li, Be, B, C, N, O, F and Ne
belong to the period-2.
(a) Write down electronic configuration of all of them.
(b) Is the number of valence electrons same for all these elements?
(c) Is the number of shells the same in these?

Answer 1

Explanation:

a) Li-2,1

b)Be-2,2

c) B-2,3

d) C-2,4

e) N-2,5

f) O- 2,6

g) F- 2,7

h) Ne- 2,8