Question

10. An atom has electronic configuration 2.8.7. What is the atomic number of this
element, State whether the elementis metal or non-metal.​

Answer 1

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Explanation:

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Answer 2

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 fluorine.