1.

An atom has electronic configuration 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)

Answer»

SOLUTION :The atomic NUMBER of this ELEMENT is 17 (2 + 8 + 7).
(b) F (9) Electronic CONFIGURATION of F is 2, 7.]


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