Question

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$<b>Question : An atom has electronic configuration 2, 8, 7.\ \textless \ br /\ \textgreater \ (a) What is the atomic number of this element?\ \textless \ br /\ \textgreater \ (b) To which of the following elements would it be chemically similar? (Atomic numbers are given in parentheses.\ \textless \ br /\ \textgreater \ 1.N(7)\ \textless \ br /\ \textgreater \ 2.F(9)\ \textless \ br /\ \textgreater \ 3.P(15)\ \textless \ br /\ \textgreater \ 4.Ar(18)$
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Answer 1

1) Chlorine because (2+8+7=17)

2) F(9)

Answer 2

1)Chlorine

2) F {9}

✌✌ Hope it helps ✌✌