Write true or false for the following statements:

Atomic radius is measured in nanometres, 1m = 10⁹nm

Dalton’s atomic theory successfully explained:

(i) Law of conservation of mass

(ii) Law of constant composition

(iii) Law of radioactivity

(iv) Law of multiple proportion

The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?

Write true or false for the following statements:

Atoms of a given element are identical in mass but different in their chemical properties.

Write true or false for the following statements:

Atoms combine in the ratio of small whole numbers to form compounds.