Question

The last shell of an atom is called​

Answer 1

Explanation:

This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons. ... Most of the elements important in biology need eight electrons in their outermost shell in order to be stable, and this rule of thumb is known as the octet rule.

Answer 2

Last shell of an atom is called valence shell. Other names are ultimate shell and valence orbit.