2 - Mass

Mass is the amount of material that makes up an item.
You measure mass with a balance.
Below 2 types are shown, an 'ordinary' manual and an electronic balance.

           

The symbol for the quantity mass is the lowercase m.
The unit comes after the number.
The unit of mass is kg (1 kilogram = 1000 g).
The following is used for small masses: g (gram)

Example: m = 30 kg
Herein:    m is the quantity mass
                kg the unit.