grams g are a metric unit used for measuring mass
mass_unit is unit_of_measurement. gram_molecule is metric_weight_unit. gram is metric_weight_unit. mass_measurement_of_temperatures is group_of_measurement_of_temperatures. metric_weight_unit is mass_unit. milligram is metric_weight_unit. metric_weight_unit is metric_unit. mass_number is mass_unit. unit_of_mass is unit_of_measure. metric_unit is unit_of_measurement.