Question

identify each item as either an element or a compound. carbon (c) carbon dioxide (co₂) hydrogen (h) sodium chloride (nacl) done

Explanation:

Step1: Recall definitions

An element is a pure substance made of only one type of atom. A compound is a pure substance made of two or more different types of atoms chemically bonded.

Step2: Analyze carbon (C)

Carbon (C) is made of only carbon atoms. So it's an element.

Step3: Analyze carbon dioxide (CO₂)

Carbon dioxide (\(CO_2\)) is made of carbon and oxygen atoms (two different types). So it's a compound.

Step4: Analyze hydrogen (H)

Hydrogen (H) is made of only hydrogen atoms. So it's an element.

Step5: Analyze sodium chloride (NaCl)

Sodium chloride (NaCl) is made of sodium and chlorine atoms (two different types). So it's a compound.

Answer:

carbon (C): Element
carbon dioxide (\(CO_2\)): Compound
hydrogen (H): Element
sodium chloride (NaCl): Compound