Question

How many of the following postulates of Dalton's atomic theory are still scientifically accepted? I. All atoms of the same element are identical. II. Compounds are combinations of different atoms. III. A chemical reaction changes the way atoms are grouped together. IV. Atoms are indestructible.

Answer 1

The required "options are (II), (III), and (IV)".

Explanation:

Postulates of Dalton's atomic theory which are scientifically accepted are:

• Atoms are indestructible.
• Compounds are combinations of different atoms.
• A chemical reaction changes the way atoms are grouped together.

Postulates of Dalton's atomic theory which are not accepted scientifically are:

• All atoms of the same elements are identical.

            The theory states that the atoms of the same element are identical in every aspect but it is now scientifically proved that the same element should differ in their mass which is known as isotopes.