![]() ![]() ![]() It is because its outermost shell only contains 6 electrons. Types of Oxygen Elemental Oxygen, OĪtomic or elemental oxygen, or O, is rarely found on earth. Ozone is the final and third form of oxygen, symbolised by the molecular formula O3. The molecular formula for the second form of oxygen, also known as molecular oxygen or dioxygen, is O2. The first is referred to as atomic or elemental oxygen and is denoted by the molecular formula O. Because oxygen may exist in three different forms, it is an allotrope. When a substance exists in more than two distinct forms, it is said to allotrope. ![]() It is known as dioxygen, a molecular form of oxygen. Oxygen is crucial for maintaining human life. Two oxygen molecules must make a covalent double bond to create oxygen or O2. Oxygen is in its gaseous state at room temperature with no odour, colour, or smell. The nucleus of an oxygen atom consists of eight protons. The atomic number of the molecular form of oxygen is 8, represented by the chemical symbol O. The oxygen molecule model is a chemical element- a compound that contains only one kind of atom, oxygen. ![]()
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