The early history of chemistry has many interesting stories. Just consider the problems scientists had 200 years ago as they tried to figure out some of the most basic ideas of chemistry. It was clear ...

Avogadro’s number, denoted as N A, is defined as the number of constituent particles that include atoms, molecules, ions, etc. per mole of the substance. This helps in diving deep into the world of ...

October 23 is marked as Mole Day to commemorate Avogadro's Number 6.02 x 10²³ which is a basic measuring unit in chemistry. Mole Day was created as a way to foster interest in chemistry. Schools ...

Today is Oct. 23, which in the U.S. is written as 10/23. That means it’s Mole Day! For the nongeeky, nonsciencey types out there, a mole is a number used in chemistry quite a bit. It’s used to ...

October 23rd marks Mole Day in the United States. Chemistry classes and chemistry enthusiasts celebrate this unofficial holiday with activities, cakes and jokes galore. Here’s what you need to know. A ...

There is a common misconception among educators, and even some metrologists, that the Avogadro constant _N_~A~ is (or should be) a pure number, and not a constant of dimension *N*^–1^ (where *N* is ...

The International System of Units (with the abbreviation of SI units) is one of the foundations of modern science. It consists of seven base units from which all others can be derived. These are the ...

An ongoing international effort to redefine the kilogram by 2018 has been helped by recent efforts from a team researchers from Italy, Japan and Germany to correlate two of the most precise ...