All elements having atomic number 29 . Write
(1) electronic configuration of this element
(2) all the quantumnumbers for an unpaired electron of this element.

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Solution

Electronic configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s¹

The unpaired electron is present in 4s orbital

Quantum numbers :

n = 4
l = 0
m = 0
s = +1/2

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

^{'} X^{'}

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