Question

what is the 4tha group and 4th period​

Answer 1

Answer:

The electronic configuration of X can be written asX=1s  

2

2s  

2

2p  

6

3s  

2

3p  

6

4s  

2

3d  

10

4p  

3

So, element 'X' has completely filled s- and d-orbitals and half- filled p-orbitals.

Note: Since, element 'X' belongs to fourth period, n=4. For fifteenth group, general outer electronic configuration is ns  

2

np  

3

.