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What is a molecule?

What is a molecule?

A molecule is a group of non-metallic atoms that are joined together by chemical bonds.

An example of a molecule is water, H2O which is composed of two atoms of hydrogen and one atom of oxygen.

Molecules are particles made up of two or more atoms that are joined together by chemical bonds.

The chemical bond between molecules is called a covalent bond.

Molecules are also made up of non-metallic atoms.

Molecules can be divided into two groups

  • Molecules of elements
  • Molecules of compounds
Molecules of elements Molecules of compounds

Hydrogen, H2

Oxygen, O2

Nitrogen. N2

Fluorine, F2

Chlorine, Cl2

Bromine, Br2

Sulfur, S8

Water, H2O

Carbon dioxide, CO2

Hydrogen sulfide, H2S

Sulfur dioxide, SO2

Ammonia, NH3

Methane, CH4

Methyl alcohol, CH3OH

Molecules of elements are made up of the same type of atoms

The hydrogen molecule is made up of two atoms of hydrogen and has the chemical formula of H2

Hydrogen, H2

Molecules of compounds are made up the at two or more different atoms.

Water, H2O

The water molecule is made up of atom of oxygen and two atoms of hydrogen. It has the chemical formula of H2O.