Niobium is a compound. Niobium is an element. Niobium is a metal. Niobium is a mixture.
I gave my students this multiple choice question: The chemical symbol for niobium is Nb. Based on its symbol, what can be concluded about niobium?

Only one answer is correct among these 4 choices:
- Niobium is a compound.
- Niobium is an element.
- Niobium is a metal.
- Niobium is a mixture.

Could you tell me which one is correct?

Niobium is an element.