why is a smallest particle of a gold a gold atom and a water not water atom

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Dear student,
Smallest particle of gold is gold atom because gold is pure substance made up of its own element. While in case of water, it is a compound made up of atoms of hydrogen and oxygen. Hence, in its case the smallest particle is not a water atom.
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why is a smallest particle of a gold a gold atom and a water not water atom

Dear student, Smallest particle of gold is gold atom because gold is pure substance made up of its own element. While in case of water, it is a compound made up of atoms of hydrogen and oxygen. Hence, in its case the smallest particle is not a water atom. Regards

Dear student,
Smallest particle of gold is gold atom because gold is pure substance made up of its own element. While in case of water, it is a compound made up of atoms of hydrogen and oxygen. Hence, in its case the smallest particle is not a water atom.
Regards