An element X has mass no:35and no.of neutrons 18.write atomic no and electronic configaration of X.also write group no,period no& valency of×
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atomic no. 18
electronic configuration 2,8,8
group no. 18
period no. 6
valancy 0
electronic configuration 2,8,8
group no. 18
period no. 6
valancy 0
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