Question

an element "x" has mass number 35 and the number of neutrons is 18. identify the group number and period of "x"

Answer 1

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Answer 2

$\mathcal{ANSWER}$

$\mathfrak{\large{Given}}$

Mass number of X = 35

No . of Neutrons = 18

∴ Atomic number of element X =( Mass number of X - No. of neutrons )

= (35 - 18 ) =  17

$\boxed{\bold{Atomic\ number = 17 }}$

∴ The electronic configuration of this element X = 2,8,7

So , this element belongs to Group number 17 and Period number is 3 .

Hence , the following element is Chlorine .

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