Oxygen is classified as a non-metal. It belongs to Group 16 of the periodic table, which is also known as the chalcogens. As a non-metal, oxygen exhibits several distinctive properties that set it apart from metals. It is the most abundant element in the Earth's crust by mass and commonly exists as a diatomic molecule (O2) in its gaseous form under standard conditions.

• Oxygen is classified as a non-metal.

• It is found in Group 16 of the periodic table, also known as the chalcogens.

• Oxygen is the most abundant element in the Earth's crust by mass.

• It exists as a diatomic molecule (O2) in its gaseous form under standard conditions.

• Oxygen is essential for the process of respiration in most living organisms.

• It supports combustion, making it crucial for burning and various industrial processes.

• Oxygen has high electronegativity, meaning it readily forms bonds with other elements.

• It is a poor conductor of electricity and heat, typical characteristics of non-metals.

• In its solid form, oxygen is brittle and lacks the malleability and ductility found in metals.

• Oxygen forms oxides with nearly all other elements, another common property of non-metals.