Question

What are the postulates of Dalton’s atomic theory.

Answer 1

Hint: Dalton’s atomic theory is all about the atoms and characterizes the features of the atoms and their properties. If you know about the atom, their properties and characteristics, then you can easily answer the given statement.

Complete step by step answer:
The postulates of Dalton’s atomic theory are as follows:
- Matter consists of the large number of the indivisible particles known as the atoms. Atoms are the smallest particles of an element.
- All the atoms of the same element have the same identical properties and the same mass.
- On the contrary, the atoms of the different elements have different properties and different masses.
- When atoms of different elements combine together in a fixed ratio , it results in the formation of the compounds.
- The chemical reactions only involve the reorganization of the atoms i.e. it means that the atoms can neither be created nor be lost or destroyed as a result of these chemical reactions.

Note: Dalton’s law explains the laws of the chemical combinations. The law of chemical combination includes:
(1) Law of conservation of mass:- This law states that the matter can neither be created nor be destroyed.
(2) Law of definite proportions:-This law states that a given compound always contains exactly the same proportion of elements by weight.
(3) Law of multiple proportions:- This law states that if the two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element, are in the ratio of small whole numbers.