Question

5. Which of the following is basic postulate of Dalton's atomic theory?
1) Atoms are neither created not destroyed in a chemical reaction.
2) In a compound, the relative number and kinds of atom are constant.
3) Atoms of all elements are like, including their masses
4) Each element is composed of extremely small particles called atoms​

Answer 1

Answer:

3) Atoms of all elements are like, including their masses

Explanation:

Main assumptions or postulates of Dalton are :

All matter consists of indivisible particles called atoms.

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

Atoms cannot be created or destroyed.

Atoms of different elements may combine with each other in a fixed, simple, whole number ratio to form compound atoms.

Atoms of the same element can combine in more than one ratio to form two or more compounds.

Atoms are the smallest unit of matter that can take part in a chemical reaction.

Hence option (C) is the correct answer.