Download 1 - nomorechemteachers

1. What were the four elements that the Ancient Greek believed made up
everything?
2. ___________________ supplied evidence of the existence of electrons, which are
negatively charged subatomic particles that have relatively little mass.
3. What did the Cathode ray experiment lead to?
4. Who proposed the plum pudding model?
5. ____________________is an atom consists of a dense nucleus composed of
protons and neutrons surrounded by electrons that exist in different clouds at the
various energy levels.
6. In the Bohr Model the neutrons and protons occupy a dense central region called
the ________________.
7. Put in order the following experiments in which they proposed:
Plum pudding model Daltons solid sphere model, electron cloud model, Bohr
solar system model, Rutherford’s gold foil experiment, Cathode Ray experiment,
and the Aristotelian atomic theory.
8. Who proposed the Cathode ray experiment?
9. Who proposed the solar system model?
10. What is Dalton’s solid sphere model also known as?