Question

what is valencey and variable valeny










​

Answer 1

Answer:

Valency is defined as the combining capacity of an element.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 2 and 3.

Answer 2

$\huge\underline{ \mathbb\red{❥A} \green{n}\mathbb\blue{S} \purple{w} \mathbb \orange{E}\pink{r}}\:$

Velency valeny

Metals donate electrons from their valence shell so as to form positively charged ions such that the charge on the ion is equal to its electropositive valency. In transition elements, an atom loses electrons from the shell next to the valence shell (penultimate shell). In such a situation the element exhibits more than one valency (variable valency).

DEFINITION AND IMPORTANCE OF VALENCY - DEFINITION

The valence or valency of an element is a measure of its combining power with other atoms when it forms compounds or molecules.

When two atoms approach each other and react with each other, it is their outer shells that come into contact first, and it is therefore the electrons in their outer shells that are normally involved in any chemical reaction. So it is the number of electrons in an atoms outer shell that determines, to a large extent, how that element will react chemically.