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CO is Carbon Monoxide. That is it contains one carbon and one oxygen.

As a chemical symbol/formula do NOT confuse with 'Co' , Note the small case 'o'.

This is the element 'Cobalt.

In chemical formula . A one letter element is always a CAPITAL letter. A two letter element has first letter as a capital letter and the second letter is always lower/small case.

E.g. H = Hydrogen

He = Helium .

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lenpollock

Lvl 17
2y ago

What else can I help you with?