Question

Helium atom has two electrons in its valence shell but its valency

is not two. Explain.​

Answer 1

Answer:

Helium atom has only one shell (K shell) which can have maximum 2 electrons. Thus, its shell is already complete called duplet. It can neither lose electrons nor gain electrons. Hence, its valency is 'zero'.

Explanation:

hope u got ur answer

Answer 2

Explanation:

Helium atom has only one shell (K shell) which can have maximum 2 electrons. Thus, its shell is already complete called duplet. It can neither lose electrons nor gain electrons. Hence, its valency is 'zero'.