Answer : The basic unit of mass when using the metric system is, grams (g).
Explanation:
As there are many units that are used to express a measurement. It is a S.I system known as the international System of Units.
It is the scientific methods that express the magnitude of basic units.
There are seven basic units in the system from which the other units are derived. The seven base units are, the unit meter used for length, kilogram for mass, second for time, ampere for current, Kelvin for temperature, mole for amount of substance and candela for intensity.
The Metric System measured the things in meters, grams, liters, etc and adds prefixes like kilo, milli and centi to the count orders of the magnitude.
In metric system, the unit of mass is gram (g).