There is a thin veneer of elemental matter -- I think plasma iron (edit: close -- it is degenerate iron plasma frozen into a crystal lattice) -- on the crust of the star, it is theorized.

But once you're in the creamy center, you're dealing with shit that does not fit on a periodic table. The stuff that neutron stars are made of is not molecular in any sense that you know it.

I enjoy the theoretical nuclear pasta and nuclear lasagna of crystalized neutron matter.

And some of the biggest ones may not even be neutrons anymore. The math predicts stuff like strange stars -- exotic quark plasma -- as we approach the physical limits before collapse into a singularity.

Here's the relevant PBS SpaceTime episode.

Oh okay so there are no elements at all. Fascinating!