An element "X" has mass number 35 and number of neutrons 18. Write atomic number and electronic configuration of X and also write group and period no.and valency of X.
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the atomic number of element X is 18
the electronic configuration of the given element is 2,8,8
group: 18
period : 3
valency:0
the electronic configuration of the given element is 2,8,8
group: 18
period : 3
valency:0
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chlorine is the element with atomic
number 17
electronic configuration 2,8,7
group 17
period 3
velancy 1 and valence electron 7
it gain one electron
so non metal
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