Q. Which of the following is/are true for Dalton atomic theory?
- All matter is made up of very tiny particles called atoms.
- Atoms do not participate in chemical reactions.
- Atoms are indivisible particles.
Select the correct answer from the codes given below:
Answer:
Only 1 and 3
Notes: According to Dalton's atomic theory, all matter, whether an element, a compound or a mixture is composed of small particles called atoms. The postulates of this theory may be stated as follows:
- (i) All matter is made up of very tiny particles called atoms, which participate in chemical reactions.
- (ii) Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction.
- (iii) Atoms of a given element are identical in mass and chemical properties.
- (iv) Atoms of different elements have different masses and chemical properties.
- (v) Atoms combine in the ratio of small whole numbers to form compounds.
- (vi) The relative number and kinds of atoms are constant in a given compound.