Question

The electronic configuration of an element is 2, 8, 1. Which of the following statement is true?

Options

• Valency of element is 7

• Element is diatomic

• Element is non-metal

• Element forms basic oxide

Answer 1

Element forms basic oxide

Explanation:

An electronic configuration of 2, 8, 1 signifies an atomic number of 11, which identifies the element as sodium (Na), a highly reactive alkali metal. Metals with a single valence electron readily donate it to achieve a stable octet, giving them a valency of 1 rather than 7. Because it is a metal, it reacts with oxygen to form a metal oxide (Na₂O) that dissolves in water to produce a strongly basic solution.