write the electronic configurationbof oxygen, Netrogen Chlorine, Birylium and Neon along with their valency
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electronic configuration of oxygen=2, 6,Valency=(-2)
electronic configuration of Nitrogen=2, 5
Valency=(-3)
electronic configuration of Berylium=2, 2
Valency=(+2)
electronic configuration of Neon=2, 8
Valency=0
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