Which is the correct formula for phosphorus pentachloride? pcl4 because a subscript of 4 indicates four cl atoms pcl5 because a subscript of 5 indicates five cl atoms p5cl because a subscript of 5 indicates five p atoms p5cl3 because a subscript of 5 indicates five p atoms

PCl₅ because a subscript indicates 5 chlorine atoms.

Explanation:

As the name suggests, phosphorous pentachloride contains 5 chlorine atoms as penta means five and phosphorous means P atoms.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.