Question

an atom is an electronic configuration of 2,8,7 name the elements .​

Answer 1

Answer:

As the electronic configuration of the given atom is 2,8,7 it is inferred that the atomic number of element is 17 (2+8+7). Thus element with atomic number 17 is Chlorine. Among the options given which includes Nitrogen, Fluorine, Phosphorus and Argon, chlorine is chemically similar to fluorine.

Answer 2

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An atom having electronic configuration of 2,8,7 is Chlorine (Cl).

Because chlorine has atomic number 17 i.e 2+8+7