Which of the following are Molecules?
(i) Oxygen gas
(ii) Argon
(iii)Ammonia
(iv) Helium
(v) Water
(vi) Sugar
Generally, a molecule is an electrically neutral group of two or more atoms held together by chemical bonds.
Oxygen gas is a molecule consisting of two oxygen atoms.
Ammonia is a molecule consisting of 1 atom of Nitrogen and 2 atoms of Hydrogen.
Water is a molecule consisting of 1 atom of Oxygen and 2 atoms of Hydrogen.
Sugar is a molecule consisting of 12 atoms of Carbon, 22 atoms of Hydrogen and 11 atoms of Oxygen.
Whereas Argon and Helium are noble gases and consist of a single atom of Ar and He.