What is the chemical state of thorium?

Answer 1

What do you mean?

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Thorium is the name we give to all atoms with exactly 90 protons in their nucleus.  No more, no less.

If you're asking... "what's the state of a SAMPLE of thorium atoms", then I'd have to say... "probably solid, liquid, or gas depending on the pressure and temperature".If you're asking... "what's the state of a SAMPLE of thorium atoms at STP?".  the answer is "solid'If you're asking... "what's state is naturally occurring thorium found in on Earth".. I'd have to say... "as a +4 oxide in several minerals". etc 

Answer 2

It is a solid metal that oxides quickly in air to a black solid.