Tagged: group 7A

November 28, 2020

Main Groups in Modern Periodic Table, Alkali metals, Halogens and Inert gases groups

Alkali metals are monovalent elements because they tend to lose the valency electron during the chemical reaction. the elements of group (1A) are known as alkali metals because they react with the water forming...

Chemistry

December 23, 2017

Metallic and nonmetallic property, Acidic and basic property in the periodic table

At the beginning of the nineteenth century, Berzelius was the first scientist who classified elements into two main groups (metals and nonmetals), according to their physical properties, Indeed that was before knowing anything about...