Atomicity refers to the number of atoms present in a molecule of an element or compound.
* Neon (Ne) is a noble gas. Noble gases exist as single atoms, meaning they are monoatomic. So, the atomicity of neon is 1.
* Phosphorus (P) exists in several allotropes (different structural forms). The most common allotrope is white phosphorus (P₄), which consists of four phosphorus atoms bonded together in a tetrahedral structure. Therefore, the atomicity of white phosphorus is 4.
Important Note: The atomicity of phosphorus can vary depending on the specific allotrope. For example, red phosphorus has a much larger and more complex structure with a higher atomicity.
