Question

Explain the 7^thPostulate of Daltons atomic theory.

Answer 1

The seventh postulate of Dalton's law states that

In a given compound, the relative number and types of atoms are constant.

The above statement means that a given compound, whatever be its source will always contain the same number of atoms of different elements (that form the compound). In other words, the number of atoms of different elements in a compound is fixed and does not vary. We can say that the composition of a compound is fixed as same atoms will always combine in the same ratio.

Thus a molecule of water will always have 2 atoms of hydrogen and one atom of oxygen.