We’re being asked to write a chemical formula for phosphorus pentafluoride.
A covalent or molecular compound is composed of more than one nonmetal together.
Rules for naming molecular compounds:
1. The first nonmetal is named normally and uses numerical prefixes except mono.
2. The second nonmetal keeps its base name but has its ending changed to -ide.
Mono 1 Di 2
Tri 3 Tetra 4
Penta 5 Hexa 6
Hepta 7 Octa 8
Nona 9 Deca 10
*numbers are written as subscripts of the element in the chemical formula
Write the formula for each molecular compound.
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