Atomic Structure

The subatomic particle with no mass is

• electron

• proton

• neutron

• nucleus

Protons were discovered by

• Goldstein

• Rutherford

• Chadwick

• Kanada

The atomicity of metals is

• 1

• 2

• variable

• 3

The atomicity of noble gases is

• 1

• 2

• variable

• 3

The atomicity of metalloids is

• 1

• 2

• variable

• 3

which of the following has a triatomic molecule?

• ozone

• nitrogen

• hydrogen

• sulphur

Ammonium (NH₄⁺) is a

• radical

• gas

• molecule

• atom

Sulphuric Acid is

• H₂SO₄

• H₂SO₃

• HSO₄

• H₃SO₄

Nitric Acid is

• HNO₃

• HNO₂

• H₂NO₃

• NH₃

Phosphoric Acid is

• H₃PO₄

• H₄PO₃

• H₂PO₃

• H₃PO₃