An atom has electronic configurations 2, 8, 7

An atom has electronic configurations 2, 8, 7.

(a) What is the atomic number of this element?

(b) To which of the following elements would it be chemically similar? (Atomic numbers are given in parentheses.) N(7), F(9), P(15), Ar(18)

Asked by Vishal kumar | 2 years ago |  321
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Class 10 Science Periodic Classification of Elements         Add Answer

1 Answer

Solution :-

(a) The element with electronic configuration (2+8+7) 17 is chlorine. The no. of atomic number = no. of electrons

Therefore, atomic number is 17.

(b) An atom with electronic configuration 2, 8, 7 would be chemically similar to F (9)

Answered by Shivani Kumari | 2 years ago
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