Answer: [tex]PCl_3[/tex]
Explanation:
Phosphorus trichloride is a covalent compound because sharing of electrons takes place between phosphorous and chlorine. Both the elements are non-metals and hence, will form covalent bond.
The nomenclature of covalent compound is given by:
1. The less electronegative element is written first.
2. The more electronegative element is written then, and a suffix is added with it. The suffix added is '-ide'.
3. If atoms of an element is greater than 1, then prefixes are added which are 'mono' for 1 atom, 'di' for 2 atoms, 'tri' for 3 atoms and so on..
So, the molecular formula for phosphorus trichloride is [tex]PCl_3[/tex]
