It was recently shown that eight, and not four, atoms of it make up its solid "red" allotrope; that solid, and this element's liquid form, are highly paramagnetic. The only non-carbon atom in the rings of furan, one form of it absorbs ultraviolet light and is depleted by free radicals. This element is the primary nonmetallic component of rust. For 10 points, name this element discovered by Priestley, whose triatomic form is called ozone and which makes up 20% of the atmosphere.
It was recently shown that eight, and not four, atoms of it make up its solid "red" allotrope; that solid, and this element's liquid form, are highly paramagnetic. The only non-carbon atom in the rings of furan, one form of it absorbs ultraviolet light and is depleted by free radicals. This element is the primary nonmetallic component of rust. For 10 points, name this element discovered by Priestley, whose triatomic form is called ozone and which makes up 20% of the atmosphere.
It was recently shown that eight, and not four, atoms of it make up its solid "red" allotrope; that solid, and this element's liquid form, are highly paramagnetic.
oxygen [prompt "O"; do not prompt "O2" or "O3" or silly things like that] 