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O 2 or dioxygen, the common allotrope of the chemical element oxygen; O 2−, the ion oxide; O − 2, the ion superoxide; O + 2, the ion dioxygenyl; O 2+, doubly ionized oxygen; O(2), the 2-dimensional orthogonal group in group theory; O2, an EEG electrode site according to the 10–20 system; SGI O2, a Unix workstation computer
The BT Cellnet consumer brand was renamed O 2 – the chemical symbol for an oxygen molecule – as were all the group's other businesses (other than Manx Telecom). The rebranding was overseen by the Lambie-Nairn design agency, which developed the idea of the company supplying services that were essential, much the same as oxygen is essential ...
The BT Cellnet consumer brand was renamed O2 – the chemical symbol for unbound oxygen – as were all the group's other businesses (other than Manx Telecom). The re-branding was designed by the Lambie-Nairn design agency, which developed the idea of the company supplying services that were essential, much the same as oxygen is essential for ...
There are several known allotropes of oxygen. The most familiar is molecular oxygen (O 2), present at significant levels in Earth's atmosphere and also known as dioxygen or triplet oxygen. Another is the highly reactive ozone (O 3). Others are: Atomic oxygen (O 1), a free radical. Singlet oxygen (O * 2), one of two metastable states of ...
The common allotrope of elemental oxygen on Earth is called dioxygen, O 2, the major part of the Earth's atmospheric oxygen (see Occurrence). O 2 has a bond length of 121 pm and a bond energy of 498 kJ/mol. [42] O 2 is used by complex forms of life, such as animals, in cellular respiration. Other aspects of O 2 are covered in the remainder of ...
The O2 Arena, commonly known as The O2, is a multi-purpose indoor arena in the centre of The O2 entertainment district on the Greenwich Peninsula in southeast London. It opened in its present form in 2007.
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Solid oxygen forms at normal atmospheric pressure at a temperature below 54.36 K (−218.79 °C, −361.82 °F). Solid oxygen O 2 , like liquid oxygen , is a clear substance with a light sky-blue color caused by absorption in the red part of the visible light spectrum.