Question

An atom of an element contains `29` electrons and `35` neutrons. Deduce
a. The number of protons and
b. The electronic configuration of the element.

Answer 1

(i) For an atom to be neutral, the number of protons is equal to the number of electrons.
Number of protons in the atom of the given element = 29
(ii) The electronic configuration of the atom is
`1s^(2) 2s^(2) 2p^(2)3s^(6) 4s^(2) 3d^(10)`