Main-group elements

Definition

Main-group elements are the elements found in groups 1, 2, and 13-18 of the periodic table. They are characterized by having their valence electrons in the outermost shell.

5 Must Know Facts For Your Next Test

1. Main-group elements include both metals and nonmetals.
2. Group 1 elements are known as alkali metals and are highly reactive.
3. Group 2 elements are known as alkaline earth metals and are also quite reactive, though less so than alkali metals.
4. Groups 13-18 contain a mix of metallic, metalloid, and nonmetallic elements.
5. The main-group elements play crucial roles in chemical reactions due to their valence electrons.

Related terms

Valence Electrons:

Electrons located in the outermost electron shell of an atom that determine its bonding behavior.

Periodic Table:

A tabular arrangement of chemical elements ordered by increasing atomic number.

Alkali Metals:

$$\text{Elements}$$ found in Group $$1$$ of the periodic table; these metals are very reactive.