mass, although the si unit for mass is actually the kilogram, which is 1000 times heavier.
The SI (metric) unit for mass is the kilogram.
METRIC
No mililimeter can weigh a gram. A gram is a metric unit of weight, and a millimeter is a metric unit of length or distance.
The gram is a metric unit of mass.
A "gran" is a German measurement, it is neither customary or metric. A "gram" is a metric unit.
A litre is a metric unit of volume.
It appears that you don't understand that the unit 'gram' IS a metric unit used to quantify the mass, or more conventially, the weight, of an object.
gram
it is a gram
Mass.
gram
The gram.