Iron oxides, such as rust, form when iron metal reacts with oxygen in the air. What are the chemical symbols for the two elements found in iron oxide?
A B C D
I and O Ir and O Fe and O Pb and O
Question: Iron oxides, such as rust, form when iron metal reacts with oxygen in the air. What are the chemical symbols for the two elements found in iron oxide?
(A) I and O
(B) Ir and O
(C) Fe and O
(D) Pb and O

Answer: (C) Fe and O
Answer: (B) Ir and O
Question: Iron oxides, such as rust, form when iron metal reacts with oxygen in the air. What are the chemical symbols for the two elements found in iron oxide?
(A) I and O
(B) Ir and O
(C) Fe and O
(D) Pb and O
Answer: (C) Fe and O