Tag Archives | mass

What is a mass number (A) ?

Mass number of an element is denoted by A. The mass number of an element is equal to the sum of the number of protons (P) and number of neutrons (N).

What is atomic mass (A) of an element ?

The average mass of an atom of an element is known as its atomic mass. Atomic mass of an element is designated as A. Since, atomic mass is actual mass, hence it has the unit of mass, viz, gram, kilogram, atomic mass unit, etc.

What do you mean by the term molar mass in chemistry ?

Mass of one mole of any material is called its molar mass. The molar mass is measured in the units of gram per mole (g/mole), or kilogram per mole (kg/mol). One mole contains 6.023 × 1023 chemical units.

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