The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

That pun is based on the fact that the main building blocks in the branch of science are chemical elements, pure substances ...

It took centuries to grasp the idea of chemical elements as being the bricks of the universe and that out of these building stones all matter is composed. Number of Elements.—From many facts it ...

These elements, which are the constituents of immense ... unless they are restrained by chemical combination. They then collect around the great centers of attraction constituted by the stars ...

Everything we can see and touch, and quite a lot that we can’t as well, is made of tiny particles called atoms. Some substances, like particles of this iron, contain only one kind of atom.

The transplutonium actinides are highly radioactive and rare, making them difficult to study. To examine their chemical ...

The pioneering nuclear chemist Glenn Seaborg discovered berkelium at Berkeley Lab in 1949. It was one of many achievements ...