Give the outer shells configuration of d-block and f-block elements.

Explanation

`rarr` The outer shell electronic configuration of d-block -elements is `ns^(1-2) (n-1) d^(1-10)`
`rarr` The outer shell electronic configuration of f-block-elements is `ns^(2) (n-1) d^(0 (or) 1) (n-2) f^(1-14)`