Question

___________ is defined as the combining capacity of an element.

Answer 1

Valency: Valency is defined as combining the capacity of an element with another atom to form m chemical bonds.

For example, the Valency of $\mathrm{Sodium}\left(\mathrm{Na}\right):2\left(\mathrm{K}\right),8\left(\mathrm{L}\right),1\left(\mathrm{M}\right)\mathrm{is}1.$

• If the valence electrons of an element are equal to 1,2, or 3, then valency equals the number of valence electrons.
• If the element has valence electrons 4,5,6, or 7, then valency is equal to the number of electrons to be added to complete the octet.
• I.e $\mathrm{Valency}=8-\mathrm{valence}\mathrm{electrons}$
• For noble gas valency is zero

Thus, Valency is defined as the combining capacity of an element.