Question

practice: element or compound?

1. methane \tch₄ \t______
2. sulfur \ts₈ \t______
3. hydrogen peroxide \th₂o₂ \t______
4. sulfuric acid \th₂so₄ \t______
5. ozone \to₃ \t______
6. nitrous oxide \tn₂o \t______

Explanation:

Step1: Recall definitions

• Element: A pure substance made of only one type of atom.
• Compound: A pure substance made of two or more different types of atoms chemically bonded.

Step2: Analyze each substance

1. Methane (\(CH_4\)): Contains C and H atoms. → Compound.
2. Sulfur (\(S_8\)): Contains only S atoms. → Element.
3. Hydrogen Peroxide (\(H_2O_2\)): Contains H and O atoms. → Compound.
4. Sulfuric Acid (\(H_2SO_4\)): Contains H, S, O atoms. → Compound.
5. Ozone (\(O_3\)): Contains only O atoms. → Element.
6. Nitrous Oxide (\(N_2O\)): Contains N and O atoms. → Compound.

Answer:

1. Methane (\(CH_4\)): Compound
2. Sulfur (\(S_8\)): Element
3. Hydrogen Peroxide (\(H_2O_2\)): Compound
4. Sulfuric Acid (\(H_2SO_4\)): Compound
5. Ozone (\(O_3\)): Element
6. Nitrous Oxide (\(N_2O\)): Compound