Question

Give reason. Helium atom has two electrons in valence shell or orbit but its valency is nit two explain Why?​

Answer 1

Answer:it is so because helium is a noble gas and it have atoms equal to valence electrons in valence shell

Explanation:

Answer 2

Helium atom has 2 electrons in its valence shell but its valency ... 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'.