Question

An atom has electronic configuration 2,8,7.To which of the following elements would it be chemically similar?

Answer 1

Answer:

Solution: 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 flurine.