Question

4 when elements combine to make a compound the new substance has properties from the original they may have a new
practice: element or compound?
1 methane ch₄
2 sulfur s₈
3 hydrogen peroxide h₂o₂
4 sulfuric acid h₂so₄
5 ozone o₃
6 nitrous oxide n₂o

Explanation:

To determine if a substance is an element or a compound, we use the definitions: an element is a pure substance made of only one type of atom, while a compound is a pure substance made of two or more different types of atoms chemically bonded.

Step 1: Methane ($\ce{CH4}$)

Methane has carbon (C) and hydrogen (H) atoms. Since it has two different elements, it is a compound.

Step 2: Sulfur ($\ce{S8}$)

Sulfur is made of only sulfur atoms. So, it is an element.

Step 3: Hydrogen Peroxide ($\ce{H2O2}$)

Hydrogen peroxide has hydrogen (H) and oxygen (O) atoms. Two different elements mean it is a compound.

Step 4: Sulfuric Acid ($\ce{H2SO4}$)

Sulfuric acid has hydrogen (H), sulfur (S), and oxygen (O) atoms. Multiple different elements make it a compound.

Step 5: Ozone ($\ce{O3}$)

Ozone is made of only oxygen atoms. Thus, it is an element.

Step 6: Nitrous Oxide ($\ce{N2O}$)

Nitrous oxide has nitrogen (N) and oxygen (O) atoms. Two different elements mean it is a compound.

Answer:

s (Element/Compound):

1. Methane ($\ce{CH4}$): Compound
2. Sulfur ($\ce{S8}$): Element
3. Hydrogen Peroxide ($\ce{H2O2}$): Compound
4. Sulfuric Acid ($\ce{H2SO4}$): Compound
5. Ozone ($\ce{O3}$): Element
6. Nitrous Oxide ($\ce{N2O}$): Compound