Atomicity is defined as the number of atoms that constitute one molecule of an element.
Phosphorus exhibits different allotropes. The most commonly encountered and stable allotrope is white phosphorus.
White phosphorus exists as molecules with the empirical formula $P_4$.
The molecular formula $P_4$ clearly shows that each molecule contains four atoms of phosphorus.
Consequently, the atomicity of phosphorus in its common allotropic form is tetra-atomic.
Common salt (NaCl) is not used as a raw material for preparation of which one of the following compounds?
Which one of the following is the chemical formula of Hypobromous acid?
Which one of the following is not used as a raw material in the manufacture of glass?
Which one of the following statements about dihydrogen (H 2) is not correct?
Reaction of quick lime (CaO) with water to produce slaked lime (Ca(OH) 2) is an example of