When the alkali metals react with the different halogens (Group 7 of the periodic table), the group of compounds formed are known as the alkali metals halides. Due to the fact that there are a number ...

In this video excerpt from NOVA's "Hunting the Elements," New York Times technology columnist David Pogue examines how atomic structure determines reactivity. Meet Theo Gray, chemist and author, who ...

When the alkali metals are cut, they initially appear shiny grey but quickly become dull and white as they react with oxygen in the air. This is known as tarnishing. Sodium tarnishes more quickly than ...

In this video excerpt from NOVA's "Hunting the Elements," New York Times technology columnist David Pogue investigates chemical reactions involving sodium. Find out how the electron configuration of ...

There are 118 elements known at present. There are similarities as well as differences are the properties of these elements on the basis of their, all the element can be divided three types: Metal; ...

Cesium, or caesium, is an alkali metal on the periodic table with the atomic number 55. It is highly reactive and pyrophoric, meaning that the mere oxygen in the atmosphere is sufficient to make it go ...