Atomic Mass

 

Atomic Mass

Atomic Mass and Atomic Mass Unit

• Atomic mass is the total of the masses of the electrons, neutrons, and protons in an atom, or in a group of atoms, the average mass.
• The mass of an atomic particle is called the atomic mass.
• This is commonly expressed as per the international agreement in terms of a unified atomic mass unit (AMU).
• It can be best defined as 1/12 of the mass of a carbon-12 atom in its ground state.

Molecular mass

Molecular mass of an element is defined as the sum of the masses of the elements present in the molecule.

• Molecular mass is obtained by multiplying the atomic mass of an element by the number of atoms in the molecule and then adding the masses of all the elements in the molecule.