who was John Dalton? explain the Dalton's atomic theory (question is from 9th cbse science text book Atoms and molecules lesson)
Answers
Dalton was great scientist
Dalton's experiments on gases led to his discovery that the total pressure of a mixture of gases amounted to the sum of the partial pressures that each individual gas exerted while occupying the same space. In 1803 this scientific principle officially came to be known as Dalton's Law of Partial Pressures.
Explanation:
DALTON LAWS:
(i) Atoms of same elements are same in all aspects.
(ii) Atoms of different elements are different in all aspects.
(iii)Atoms are made up of tiny particles they are molecules.
(iv) Atoms combine in a fixed ratio.
(v) Atoms are undivisible.
DRAWBACKS:
(i) Atoms are divisible..
(ii)Many of the postulates are wrong.
(iii) Atoms of same elements are not same in aspects.
(iv) Atoms of different elements may show same properties.
(v) In case of complex componds combined ratio cannot be formed.