Question

The electronic configuration of the elements X, Y and Z are given below?
a) X = 2
b) Y = 2,6
c) Z=2, 8,2
i) Which element belongs to second period?
ii) Which element belongs to second group?
111) Which element belongs to 18th group?​

Answer 1

Answer:a) X=2                b)Y=2,6              c)Z=2,8,2

  1s  

2

                  1s  

2

 2s  

2

 2p  

4

       1s  

2

 2s  

2

 2p  

6

 3s  

2

.

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.

Explanation: