Question

Which of the following are the postulates of Dalton's atomic theory?

• A. Atoms cannot be subdivided, created or destroyed.
• B. Atoms of same element are similar in shape and mass.
• C. Elements are made of extremely small particles called atoms.
• D. Atoms contain mostly empty space.

Answer 1

Answer: (A), (B), (C)

The correct options are
A Atoms cannot be subdivided, created or destroyed.
B Atoms of same element are similar in shape and mass.
C Elements are made of extremely small particles called atoms.

According to Dalton's atomic theory:
$\bullet$ Matter is made up of indivisible particles called atom.

$\bullet$ Atoms cannot be created nor be destroyed.

$\bullet$ Atoms of the same element are similar in shape and mass but differ from that of atoms of other elements.

It was proved later by Rutherford that most of the space of an atom is empty and the mass of an atom is concentrated in the nucleus.