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The 2 indicates that there are 2 oxygen atoms.

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Edgar Graham

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2y ago
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15y ago

If the number is after a letter, then it has to be subscript. If it is before a letter then it is normal. The only time you would use superscript would to indicate ionic charge or the mass number.

Examples:

CO2

2H2O <---- this is saying two molecules of water, each of which has two hydrogen and one oxygen

CH4 <---- this is saying one carbon bonded to four hydrogens

2CH4 <---- this is saying two molecules of the compound (methane), each of which has one carbon atom bonded with four hydrogen atoms. The overall total number would be two carbon and eight hydrogen

Mg+2 <---- this is a magnesium ion with a charge of +2

232U <---- this is an isotope of uranium with a mass number of 232

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Someone

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2y ago
Anonoymous

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12y ago

The 2 indicates that there are 2 oxygen atoms.

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Someone

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2y ago

Subscript. Superscript is small.

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Q: Does CO2 have a subscript or superscript?
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