Which of the following is an alkaline earth metal?
A
Potassium
B
Sodium
C
Calcium
D
Aluminium
Correct Answer: Option C — Calcium
Explanation:
Calcium belongs to Group 2 of the periodic table, classified as alkaline earth metals. These elements have two valence electrons and are les...
Calcium belongs to Group 2 of the periodic table, classified as alkaline earth metals. These elements have two valence electrons and are less reactive than alkali metals but still readily form +2 ions in compounds.