Atomic model development

Question 1

first belief

Answer 1

initially believed atoms were tiny undividable spheres

Question 2

Plum pudding model

Answer 2

Discovered electrons - balls of positive charge with electrons scattered in it

Question 3

Nuclear model

Answer 3

Alpha particle scattering experiment - tiny positive nucleus at the centre, cloud of electrons

Question 4

Bohr model

Answer 4

Bohr suggested electrons orbit in shells

Question 5

Later experiements

Answer 5

James Chadwick - discovered protons and neutrons