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O2- is the symbol for the oxide ion, which is an oxygen atom that has gained two electrons. The oxide ion has a charge of -2.

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Q: What does O with a little 2 the top mean in chemistry?
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What does 2 and a little 6 at the top mean?

it means 2 to the sixth power or 2X2X2X2X2X2


What is 2 and a little four at the top mean?

You mean like 24? Well that means 2*2*2*2 which is equal to 16. Hope this helps!


What does 4 mean with a little 2?

It depends where the little 2 is. If it is to the top right, it means 4-squared or 4 times 4 = 16.


What does the little 2 in 4H2 mean?

The little 2 in 4H2 indicates that there are two hydrogen atoms bonded in a molecule of 4H2. This notation is used in chemistry to represent the number of atoms of each element in a compound or molecule.


In maths what is a number with a little 4 at the top mean?

This means the number to the power of 4. If the number is 2 and it is to the power of 4 this means: 2 x 2 x 2 x 2 = 16


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If you mean on the keys, it is usually shown as: x² or X².


In maths what is a number with a little 3 at the top mean?

This means you cube a number. This is equivalent to multiplying it by itself three times.For example, 2 cubed = 2 x 2 x 2 = 8.


2 with a little 2 at the top means what?

it means you multiply 2x2


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What is the little 2 in h20?

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