Atomic Theory

1. Positively charged particle.
5. Model that said the atom was mostly the same consistency throughout with electrons scattered throughout.
9. Who discovered atoms?
11. Negatively charged particle.
12. Model that said that it’s impossible to simultaneously know the exact position and momentum of a particle.
16. Who discovered the electron?
18. Model that said atoms were just hard spheres.
20. The regions around an atom that are most likely to contain electrons.

2. Made up of protons and neutrons.
3. Bohr's model of an atom that said electrons could jump to different orbits.
4. Particle with no charge.
6. The number of protons in the nucleus.
7. Came up with the "Quantum Mechanical Model" of the atom (also known for his kitty)
8. Rutherford's model where most of the atom's mass was in its nucleus and electrons orbited it (aka Planetary Model).
10. Said there's a fundamental limit to what we can know about the behavior of quantum particles.
13. Who discovered the neutron?
14. Average mass of the atom.
15. Rutherford's experiment that showed the mass of the nucleus was 10,000 times smaller than the atom itself.
17. Millikan's experiment that showed the size of a charge on an electron.
19. Created the "Billiard Ball Model" of an atom.