BTW THIS A 2 QUESTION TEST THERE WILL BE 2 THINGS TO ANSWER
William finds a piece of pure iron in his garden. After a few days, the iron begins to rust. What are the two types of substances involved in the rusting process of iron?
Iron is
A a compound
B an element
C a mixture
with one kind of atom that combines with oxygen from the air to form rust (iron oxide). Rust contains two types of atoms, which means it is
A a compound
B an element
C a mixture