Question

What Is the Valency of Helium?

Answer 1

Valency

• The valency of an atom refers to its ability to combine with other atoms.
• The valency of an element determines the number of bonds that an atom can make as part of a complex.
• The electrons in the atom's outermost orbit are referred to as valence electrons.

Valency of Helium

• Helium which is represented by the symbol $\mathrm{He}$ has the atomic number $2$.
• Electronic configuration of $\mathrm{He}$ can be written as $1{\mathrm{s}}^2$.
• It contains fully filled shell so the valency of helium will be zero.
• This can be explained on the basis of noble gas configuration which suggests that an atom is not able to lose or gain electrons.

Hence, valency of Helium is $0$.