metalloid, non-metal, transitional, metal and rare-earth element
Hydrogen.
Go to this website
he made up the periodic tables
Dmitri Mendeleev.
The columns are known as groups.
no, they depend on what country your in
Periodic tables are important in most scientific classes because they help understand similarity of properties and reactions of elements.
7The Periodic Table has 7 periods and 18 groups.
There have been around 700 different periodic tables created since the concept was first introduced in the 19th century. These periodic tables vary in organization, structure, and focus, but all aim to arrange the elements based on their properties and behaviors.
Jeff And BoB
Different periodic tables use different weights because of the different technologies that are used.
Read the explanations under your periodic table; not all periodic tables have colors.