Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order:

(i) Rutherford’s atomic model

(ii) Thomson’s atomic model

(iii) Bohr’s atomic model

Which of the following statements about Rutherford’s model of atom are correct?

(i) Considered the nucleus as positively charged.

(ii) Established that the - particles are four times as heavy as a hydrogen atom

(iii) Can be compared to solar system

(iv) Was in agreement with Thomson’s model

Which of the following are true for an element?

(i) Atomic number = number of protons + number of electrons

(ii) Mass number = number of protons + number of neutrons

(iii) Atomic mass = number of protons = number of neutrons

(iv) Atomic number = number of protons = number of electrons

The presence of protons and neutrons at the centre of the atom was suggested by:

The presence of electrons outside the nucleus and nucleus at the centre of the atom was suggested by: