An atom of an element contains 29 electrons and 35 neutrons. Deduce (1) the number of protons and (2) the electroniic configuration of the element.

Explanation

(1) For an electrically neutral atom, number of protons=number of electrons=29.
(2) Elecronic configuration: `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(1)`.