Question

select the correct formula for phosphorus pentachloride.
o pcl₅
o cl₅p
o p₂cl₅
o cl₂p

Explanation:

In chemical naming, "penta -" means five. Phosphorus pentachloride has one phosphorus (P) atom and five chlorine (Cl) atoms. The chemical formula is written with the less - electronegative element first, so it is $PCl_5$.

Answer:

A. $PCl_5$