On this day, October 4th, in 1971 the mole was officially adopted as a base quantity of the SI units of measure by the General Conference on Weights and Measures. Happy birthday mole!
Some facts about the mole (mol):
What is a mole exactly?
According to Resolution 3 of the 14th meeting of the CGPM, a mole “is the amount of a substance of a system which contains as many elementary entities as there are atoms in 0.012 kilograms of carbon 12.” Translated to semi-understandable English… A mole has 6.0221415×1023 atoms or molecules of the pure substance being measured.
Where did the name come from?
The term mole was coined in 1893 by Wilhelm Ostwald. It was a German term (Mol).