Of the seven base units found in SI, it is the only one that is defined wit
Of the seven base units found in SI, it is the only one that is defined without reference to outside properties, instead defined by a prototype made from a platinum-iridium alloy, but there are calls to redefine it so as to fix Planck's constant. Also the only base unit that already has a prefix, for ten points, name this SI unit of mass.
Of the seven base units found in SI, it is the only one that is defined without reference to outside properties, instead defined by a prototype made from a platinum-iridium alloy, but there are calls to redefine it so as to fix Planck's constant.
{Kilogram}