The periodic table organizes chemical elements based on atomic weight, electron configurations, and chemical properties, ...

Elements in group 1 and group 2 are metals ... See the study guide on groups in the periodic table for more information.

The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But ...

Can France claim the first periodic table? Probably not ... followed by a very reactive light metal and then a less reactive light metal. Initially, the table had similar elements in horizontal rows, ...

Both rubies and emeralds are minerals, which is a type of rock with a consistent chemical composition and a highly ordered ...

Is the periodic table hanging in your lab ... Before 1886, aluminum was a semiprecious metal comparable in price to silver. The third most abundant element in the earth’s crust—and its most plentiful ...

One feature of compounds made with transition metals is their intense colour. There are many examples in nature, including ...

A study of the properties of this oxide and of the metal itself ... rare earths in relation to the periodic table. The group of elements known as the “rare earths” has presented an exceedingly ...

Spraying Windex onto the samples produces a color that depends on the metal residing in the dirt ... we asked clubs to create elements of the periodic table featuring a mole. The Period Table of ...