CD Element z is in third period and...
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CD Element z is in third period and group 17 a of the period Table ras Is it a metal ay non - metal ? 262 what is the number of valency elections in its atom?

NEET/Medical Exams
Chemistry
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( 3^{text {nd }} ) period grocyp ( underline{17} ) The element is chlorine This is non-metal. St can accept ie to have fully filled orbit. So, monovalent Clectronic contiguration ( =1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5} rightarrow 1 a s+e 1 e c b r o ) So, hon-metal and monovalent
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