Question

The element in the third period having three valence electrons is _______.

Answer 1

• The outermost shell of an atom is called the valence shell, and the electrons in that shell are called the valence electrons.
• In the third period of the table, Aluminum (Al) has 2 electrons in K-shell, 8 electrons in L-shell, and 3 electrons in M-shell.
• Hence, Aluminium(Al) is an element in the third period having three valence electrons.