Which element exists as single atoms?

The element C exist as single atom.
The base unit of standard matter that makes up a chemical element is just an atom. Atoms that are neutral or ionized make up every solid, liquid, gas, as well as plasma.
Any compound that could be broken into simpler components by standard chemical processes is referred to be a chemical element.
It can be seen that element C has completed its octet. Hence, it will exist as single atom.
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