Question

What does the principal quantum number describe?

a) The spin of the electron

b) Spatial orientation of the orbital

c) The shape of the orbital

d) Energy and size of the orbit

Answer 1

Correct Option: (d)

Reason:The principal quantum number among the four quantum numbers describes the size and energy of the orbit. For shells K, L, M, N and O, n is given by 1, 2, 3, 4 and 5.