Phosphorus is an element in which the atoms often bond together in groups of four. Identify what each group is called.

The groups of four phosphorus atoms that bond together are referred to as "tetramers." In the case of phosphorus, the molecular form that consists of four atoms is specifically denoted as P₄. This tetrameric form is the most common allotrope of phosphorus at room temperature and pressure and is often characterized by its white or red phosphorus forms.

In chemistry, the tetravalency of phosphorus allows it to form various allotropes, with P₄ being a significant example where the four atoms are arranged in a tetrahedral geometry. This molecular structure impacts its chemical properties and reactivity, making it an essential element in various biochemical processes and applications, such as fertilizers and pesticides. Overall, understanding the tetrameric nature of phosphorus provides insight into its behavior in different chemical contexts.