Which of the following is an example of an alkali metal?
A
Calcium
B
Magnesium
C
Potassium
D
Aluminium
Correct Answer: Option C — Potassium
Explanation:
Potassium belongs to Group 1 of the periodic table, known as alkali metals. These elements are highly reactive, have a single valence electron, and readily form +1 ions in chemical reactions.