Which element has the chemical symbol 'O'?

The element with the chemical symbol 'O' is oxygen. In the periodic table, each element is represented by a unique one- or two-letter symbol. Oxygen is a vital element for life on Earth, essential for respiration in many organisms and a key part of water (H2O). It is a non-metal that typically exists as a diatomic gas (O2) under standard conditions.

Other elements mentioned, such as osmium, gold, and iron, have their own distinct symbols: osmium (Os), gold (Au), and iron (Fe), which clearly differentiates them from oxygen, reinforcing that 'O' specifically corresponds to oxygen. Understanding the periodic table's organization and the significance of each element's symbol is crucial in chemistry and helps identify and describe chemical substances accurately.