I can not figure this problem out and it’s extremely frustrating. Someone please do this for me so I can see how to do it. Write neatly please.

Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons