Different Allotropes of Oxygen

Which of the following is a set of allotropes of the same element?

1. graphite, tungsten carbide

2. water, ice

3. no, no2, n2o

4. o2, o3

5. aluminum, aluminum oxide, O₂ and O₃ are allotropes of the same element.

Answer:

The correct answer is: 5. aluminum, aluminum oxide, O₂ and O₃ are allotropes of the same element.

Allotropes are different forms of the same element in the same physical state. In this case, aluminum, aluminum oxide, O₂ (dioxygen), and O₃ (ozone) are all allotropes of the same element, which is oxygen.

Aluminum is a metal element, while aluminum oxide is a compound where aluminum is combined with oxygen atoms. O₂ and O₃ are different molecular forms of oxygen. Dioxygen (O₂) is the most common form found in the Earth's atmosphere, while ozone (O₃) is less stable and highly reactive.

Understanding different allotropes of oxygen is fascinating as it shows how the same element can exist in various forms under different conditions. These allotropes have unique properties and applications in various fields of science and industry.