What would be the formula of the compound iron (iii) phosphide?

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

What is the maximum number of electrons that an atomic orbital can contain?