meginhópurinn
Meginhópurinn, also known as the Main Group or the Principal Group, is a term used in chemistry to describe the main groups of elements in the periodic table. These groups are numbered from 1 to 18 and are characterized by the number of electrons in their outermost energy level. The Main Group elements are distinct from the Transition Metals, which are found in the middle of the periodic table.
The Main Group elements include the alkali metals (Group 1), alkaline earth metals (Group 2), pnictogens (Group
The Main Group elements are further divided into subgroups based on their electron configurations. For example,
The Main Group elements play a crucial role in chemistry and are involved in numerous chemical reactions.