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What does the subscript 2 show in this chemical equation? h2o → 2h o

Athere are 2 oxygen atoms.
Bthere are 2 hydrogen atoms.
Cthere is half of a hydrogen atom.
Dthere are 2 water molecules.

Verified Answer :

there are 2 hydrogen atoms. 
it is right answer that is option B.

Answer: B : There are two hydrogen atoms.

Explanation:In chemical reactions, symbols and formulas represent the substances that are formed or broken down. The formula for water is H2O.


The symbols H and O mean that water contains the elements hydrogen and oxygen. The subscript 2 shows that there are 2 hydrogen atoms in a molecule of water.


Since there is no number beside the O, there must be only one oxygen in the water molecule.

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