Question

Statement I: Valency of an element is determined by the number of valence electrons in its atom.

Statement II: The valency of oxygen is 2.

• A. Both the statements are true
• B. Both the statements are false
• C. Only statement I is true
• D. Only statement II is true

Answer 1

The correct option is A Both the statements are true

$\bullet$ Valency is the combining capacity of an element. It is determined by a short-cut method from the number of valence electrons in an atom.

$\bullet$ If the valence electrons are greater than four, then the valency = 8 - number of valence electrons in it.

$\bullet$ Oxygen has eight electrons and hence, its electronic configuration is 2,6.

$\bullet$The valency of oxygen = 8-6 = 2