EVERYDAY SCIENCE

Detailed explanation-1: -Hence, Aluminium(Al) is an element in the third period having three valence electrons.

Detailed explanation-2: -Answer and Explanation: Aluminium has 3 valence electrons. Valence electrons are located in the outermost shell of an element.

Detailed explanation-3: -Aluminum has 13 electrons so it will have the electron arrangement (2, 8, 3) which represents two electrons in the n=1 energy level, eight electrons in the n=2 level, and three electrons in the n=3 level.

Detailed explanation-4: -An aluminum atom has two electrons in its first shell, eight electrons in its second shell, and three electrons in its third (valence) shell. The second shell has an octet, while the valence shell has 3 electrons.