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प्रश्न
The electronic configuration of an element is 2, 8, 1. Which of the following statement is true?
पर्याय
Valency of element is 7
Element is diatomic
Element is non-metal
Element forms basic oxide
MCQ
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उत्तर
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.
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