An atom has an atomic number 17 The valency of that atom is.
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The element is chlorine. The electronic configuration is 2,8,7.
So the valency = 8-7 = 1. Its valency is 1 and it is a non-metal and it is present in the 17
th
group.
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Valency of Chlorine
The atomic number of chlorine is 17 (Z=17). The electronic configuration of chlorine can be written as 2, 8, 7. 2, 8, 7 electrons are distributed in the shells K, L, M respectively. Therefore, valence electron in chlorine is 7 and it needs to gain 1 electron from the outermost orbit to attain octet.
Explanation:
An atom has an atomic number 17 The valency of that atom is...Valency of Chlorine
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