Question

An atom of an element contains 29 electrons and 35 neutrons. Deduce the electronic configuration of the element.

Answer 1

The electronic configuration of the atom is

1s2 2s2 2p6 3s2 3p6 4s1 3d10. electronic configuration of copper 

Answer 2

"We know that an atom consists of protons, electrons & neutrons.

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 "