Question

Which among the following elements possess one electron in 4s orbital in observed electronic configuration?
a.Mn(z=25)
b.C4(z=29)
c.Ni(z=28)
d.V(z=23)​

Answer 1

Answer:

option a

Explanation:

1s<2s<2p<3s<3p<4s.... (Energy orbitals)

Total no. of electrons required in the orbitals - 2+2+8+2+8+1=25

hence, the correct ans. is Option a. Mn