level: Model of Atom
Questions and Answers List
level questions: Model of Atom
| Question | Answer |
|---|---|
| What was Thomsons plum pudding model | - discovered electrons in 1897 - a ball of positive charge with electrons mixed in with the dough |
| What was Rutherfords nuclear model | - discorved an atoms mass is concentrated in centre - and contained protons |
| What was Niels Bohr discorvery | - electrons orbit the nucleus - some particles have no charge and he called it neutrons |
| Charge of sub atomic particles | protons - +1 (mass of 1) electrons - -1(mass very small) neutrons - 0 (mass of 1) |