Question

An element ‘X’ is forming an acidic oxide. Its position in modern periodic table will be:

Options

• Group 1 and Period 3

• Group 2 and Period 3

• Group 13 and Period 3

• Group 16 and Period 3

Answer 1

Group 16 and Period 3

Explanation:

Sulfur (S), a nonmetal in group 16, period 3, forms acidic oxides such as SO₂ and SO₃ which give acids in water; by contrast Group 1 and 2 oxides are basic and Al (Group 13) oxide is amphoteric.