Which among the following is an element
H20 NaCl N2 C12H22O11
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Answer:
Correct option is
A
O
A molecule may be homonuclear, that is, it consists of atoms of a single chemical element, as with oxygen (O
2
or N
2
), or, it may be heteronuclear, a chemical compound composed of more than one element, as with water (H
2
O or CO
2
). Out of all the options, O represents a single oxygen atom and not a molecule.
Explanation:
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