Question

An atom of an element contains 29 electrons and 35 neutrons. Deduce:

(a) the number of protons.

(b) the electronic configuration of the element.

Answer 1

So, a positive molecule will contain a higher number of a proton(H⁺ions), a negative particle will have a higher number of electrons(e-ions), and a neutral atom will contain the same number of protons & electrons.

Hence,

(i) For an atom to be neutral, the number of protons= number of electrons.

So, Number of protons in the atom of the given element = 29

(ii) The electronic configuration of the atom is

1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰. Hence, it is the electronic configuration of copper "