1.

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

Answer»

Solution :(i) For a neutral atom,NUMBER of ELECTRONS = number of protons 29 electrons = 29 protons.
(ii) `29Z = 1s^(2),2s^(2),2p^(6),3s^(2),3p^(6),3d^(10),4S^(1)`
(The element is copper).


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