What is the standard unit of mass in the metric system?

The standard unit of mass in the metric system is the gram. This unit is fundamental for expressing mass in scientific and everyday measurements. The metric system is based on decimal units, where the gram serves as the base measurement for mass. It can be expressed in various subunits (such as milligram and centigram) or larger units (such as kilogram), with the kilogram being the primary unit for everyday use. The gram allows for precise measurement and is widely adopted internationally.

In contrast, the pound is a unit of mass in the imperial system, not the metric system, while the liter is a unit of volume, and the meter is a unit of length. Each of these serves different purposes in measurement, highlighting the specific role that the gram plays in quantifying mass.