Question

7. (a) Explain the terms 'valency' and 'variable valency'.
(b) How are the elements with variable valency named ?
Explain with an example.​

Answer 1

Answer:

'valency'

Valency is defined as the combining capacity of an element.

'variable valency'

Some elements differ in their capacity to combine with other elements depending on the nature of the reaction; this property is called variable valency.

(b)

Some elements differ in their capacity to combine with other elements depending on the nature of the reaction; this property is called variable valency. For example, Iron (Fe) can have a valency of both 4 and 3.

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Answer 2

Answer:

Valency is the capacity of an atom to lose, gain or share atoms during a chemical reaction is called its valency . valency means the property of an element that determines the number of other atoms with which an atom of the element can combine.

Explanation: