Write the electronic configuration of the elements with the atomic number `61,91,101` and `109`.

Explanation

`Z= 61` ( Promethium , P m ) , E.C.`= [Xe]^(54) 4f^(5) 5d^(0)6s^(2)`
`Z=91` ( Protactium, Pa) , E.C. `= [rN]^(86) 5F^(2) 6D^(1) 7 S^(1)`
`Z= 101 ` ( Mendelevium, Md), E.C. `= [Rn]^(86) 5f^(13) 6d^(0) 7s^(2)`
`Z = 109` ( Meitnerium, Mt ) , E.C. `= [ Rn]^(86) 5f^(14) 6d^(7) 7s^(2)`