matter and atoms

3. according to Dalton, atoms combine to form these
4. the positively charged subatomic particles
6. Thomson's model is also called the _______ model of the atom
9. Rutherford called the centre of the atom this name
11. which particle did Rutherford use to shoot at a gold foil to study the nature of the atom
12. Heisenberg proposed an idea now called Heisenberg ______ principle
14. if you heat superheat a gas, you might get this type of element.
15. it is the mass divided by the volume of a substance

1. the quantum mechanical model is also called the electron _____ model
2. the random straight line motion of particles is called ______ motion
5. the neutrally charged subatomic particles
7. according to Bohr, the electrons only occupy specific ______ levels in an atom
8. Greek philosopher who proposed that atoms are indivisible
10. Thomson discovered these negatively charged particles in an atom
13. it is a type of metal that is commonly used to make electrical wiring