Question

The pair of elements that have similar chemical properties are :

• A. Lithium and Magnesium
• B. Beryllium and Boron
• C. Aluminium and Magnesium
• D. Carbon and Nitrogen

Answer 1

The correct option is A Lithium and Magnesium

A diagonal relationship exists between certain pairs of diagonally adjacent elements in the second and third periods. These are the first 20 elements in the periodic table.

For example, pairs lithium (Li) and magnesium (Mg), beryllium (Be) and aluminium (Al), boron (B) and silicon (Si) exhibit similar properties. Boron and Silicon are both semiconductors.

Thus, Magnesium and Lithium have similar properties.

Hence, the correct answer is option $\text{A}$.