Question

definition for valency

Answer 1

the combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with.

"carbon always has a valency of 4"

LINGUISTICS

the number of grammatical elements with which a particular word, especially a verb, combines in a sentence

Answer 2

Hey friend your answer is here ,
the valence or valency of an element is a measure of its combining power with other atoms when it forms chemical compounds or molecules.