1. Chemical Composition:

* Methane (CH4): Methane is a simple hydrocarbon with a single carbon atom and four hydrogen atoms. It is highly flammable because it readily reacts with oxygen in the air.

* Wax: Wax is a complex mixture of hydrocarbons with long chains of carbon atoms and hydrogen atoms. These chains are more stable and less reactive than the simple structure of methane.

2. Volatility:

* Methane: Methane is a gas at room temperature and has a low boiling point. This means it easily evaporates and mixes with air, creating a flammable mixture.

* Wax: Wax is a solid at room temperature and has a high melting point. It requires significant heat to vaporize and create a flammable mixture.

3. Surface Area:

* Methane: Methane is a gas, so it has a large surface area that readily interacts with oxygen.

* Wax: Wax is a solid, so it has a smaller surface area, which reduces the rate of reaction with oxygen.

4. Ignition Temperature:

* Methane: Methane has a relatively low ignition temperature, meaning it can ignite at a lower temperature compared to wax.

* Wax: Wax has a higher ignition temperature, requiring more heat to start burning.

5. Energy Content:

* Methane: Methane is a highly energetic fuel, meaning it releases a large amount of energy when burned.

* Wax: While wax also has energy content, it is less energetic than methane per unit mass.

In summary:

The complex structure, low volatility, smaller surface area, higher ignition temperature, and lower energy content of wax make it more difficult to ignite compared to methane.