Question

The Electronic configuration of the element X, Y and Z are given below
a) X = 2,5
b) Y = 2,8,1
c)Z = 2,8
1) Which element belongs to 18th group?
m) Which element belongs to 15th or V group?
m) Which element belongs to third period?​

Answer 1

Answer:

a) X= 2

1s two

b)Y = 2,6

1s two 2s two 2p four.

c) Z=2,8,2

1s two 2s two 2p six 3s two

i) 'Y' belongs to the 2nd period. Because its electronic configuration ends with n=2

ii) 'Z' belongs to the 2nd group as its last electron enters into the second group of s-subshell.

iii)'X' belongs to 18th group.