Which metals are so reactive that they are never found as uncombined elements in nature? A. alkaline earth metals

B. alkali metals

C. rare earth metals

D. transition metals

B. alkali metals

Explanation:

They are never found in nature uncombined because they are unstable and they react fast to other elements.

it's filtration, but this is an assumption so my apologies if i got this

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.