It depends on the scale. For a scale in a chemistry lab probably a gram. For old fashioned stores: a kilogram. Precision scales could be a milligram.
There is no real "basic" metric unit for a balance scale. The counterweights you use are determined by the item you are measuring.
The basic metric unit for weight is the newton.
The basic metric unit of measure for length is the meter (m).
Mass.
The basic unit of length in the metric system is the meter.
Probably a kilogram.
The basic metric unit for weight is the newton.
The basic metric unit of mass is the gram (g).
The basic metric unit of length is the meter (m).
The basic unit of mass in the metric system is the gram.
Mass is typically measured in the metric system using a scale or balance. The unit of measurement for mass in the metric system is the gram (g) or its multiples such as kilograms (kg) and milligrams (mg).
The basic metric unit of measure for length is the meter (m).
Newtons is the basic metric system unit for weight
The basic unit in the metric system for length is the meter.
One degree on the Celsius scale is equivalent to one Kelvin in the metric unit of temperature.
The basic metric unit of volume is the liter (L).
The basic unit is a Kelvin but it is common to use a degree Celsius. The Kelvin scale is absolute whereas the zero point on the Celsius scale is arbitrary.
The SI, or metric, base unit for length is the metre.