Question

The outermost shell of an atom is known as its _________ and the electrons in it are known as ________.

• A. valence shell
• B. valence electrons

Answer 1

• Valence shell: The outermost shell of an atom is known as the valence shell.
• The electrons present in the valence shell (outermost shell) are known as valence electrons.
• For example, if the electronic configuration of a sodium atom is 2,8,1, then its outermost shell has 1 valence electron.
• The number of valence electrons can vary from 1 to 8 in different elements.

Hence, The outermost shell of an atom is known as its valence shell and the electrons in it are known as valence electrons.