What does o2 stand for

Dictionary Dictionary Term of the Day. International Certificate in Construction Health and Safety. Safeopedia Terms. Meet the Author with Robert J. De Boer. Safety Talks 18 - Heat Stress Preparedness. The Dangers of Gas in a Confined Space. Preventing Burst Pipes in Aging Buildings. Here's Why It Should Be. Hiring Contractors? Couldn't find the full form or full meaning of O2? Discuss these O2 abbreviations with the community: Newest Oldest Popular.

Notify me of new comments via email. Mayra Nattaly. Like Reply Report 5 years ago. Cancel Report. Create a new account. Log In. Know what is O2? Got another good explanation for O2? Oxygen isn't always O 2 but can be formed in the upper atmosphere or in some reactions as O 3. Chemists mix and match their terminology somewhat freely when it doesn't matter much, but try to be as specific as possible when it does.

O is a singular oxygen atom. O 2 is a molecule made of two oxygen molecules. Our atmosphere is made of mostly O 2 , which our bodies have evolved to breathe. O is oxygen, while O 2 is dioxygen. Examples of other oxygen molecules are: 0 3 which is ozone trioxygen , there's O 4 that is metastable and is actaully made up of two O 2 molecules tetraoxygen , and O 8 which is a form of pressurised solid O 2 when you freeze O 2 to below around 55 Kelvin and pressurise to around 10 GPa 1.

Context is important. C is the atomic symbol for carbon and can represent not only the element, but one or more atoms of the element, as well as the element as it exists in the understood implied conditions.

Same is true for O or N or actually any element. However, elemental O and N are both commonly found as diatomic molecules O 2 and N 2. I will turn your question around: since oxygen and nitrogen are commonly represented by their ground state chemical compounds at STP why isn't carbon represented by C graphite?

The reason is fairly straightforward: it is because the actual compound we have in front of us may be difficult to determine in the case of C or S , while there's generally no question about O 2 or N 2 being the compound we have. So, we use the atomic symbol to represent the elemental material when it is either of indeterminate or of variable composition. Carbon, in particular, is often found or used as allotropes different than graphite.

So we are as specific as we can be, without risking being wrong. If we specify O 2 then sure, there might be some trace amounts of O 3 or even O. It is much harder to do that with solid elements, so we avoid being too specific remember, as scientists, we should be able to justify our claims, including the nature of the materials we are discussing by using the atomic symbol. Liquid bromine, for instance might be represented as either Br l or Br 2 l although the second is the ground state elemental form at STP.

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