# nspin and starting_magnetization in Quantum Espresso

In Quantum Espresso, there is a parameter called nspin, which I understand to include in INPUT if there is a paramagnetic species, like $$\ce{Fe}$$. Thus, we also include starting_magnetization parameter.

I have an $$\ce{Fe}$$ slab now and require to study adsorption of $$\ce{PO4^{3-}}$$ (phosphate species) onto the $$\ce{Fe}$$ slab. Must I include starting_magnetization for $$\ce{PO4^{3-}}$$? I am assuming that the electronic configurations of $$\ce{P}$$ ($$2\mathrm{p}^3$$) and $$\ce{O}$$ ($$2\mathrm{p}^4$$) has unpaired electrons, just like $$\ce{Fe}$$ ($$3\mathrm{d}^6$$)!

Along with Fe, must I include the parameter starting_magnetization(2) and starting_magnetization(3) for $$\ce{P}$$ and $$\ce{O}$$ atoms?