An atom of an element contains 29 electrons and 35 neutrons. Deduce (i) the number of protons and (ii) the electronic configuration of the element.


(i) In an atom the number of electrons is always equal to the number of protons to balance the charge in the atom and thus an atom is electrically neutral.

So, number of protons = number of electrons = 29


(ii) The electronic configuration of the atom is given as below


1s2 2s2 2p6 3s2 3p6 4s1 3d10


This electronic configuration refers to the electronic configuration of copper.


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