Atoms and States of Matter

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Across
  1. 2. The physicist who discovered the electron using a cathode ray tube.
  2. 4. The change of state from solid directly into gas. (Dry ice does this!)
  3. 6. A negatively charged particle that is found in atoms.
  4. 7. The state change were a gas turns into a liquid.
  5. 10. The state change from liquid to gas.
  6. 11. Schrodinger used this scientist's uncertainty principle to show that electrons exist in a cloud with a probability of being found in different parts. (Also Walter White's alias in Breaking Bad!)
  7. 13. The state of matter where particles (or molecules) are close together, but can glide over each other.
  8. 14. Electrons exist in orbits at certain energy levels in this model of the atom.
  9. 15. The subatomic within atoms that has a zero charge.
Down
  1. 1. The state of matter with the lowest energy.
  2. 3. The centre of an atom, made up of protons and neutrons.
  3. 5. The basic building block of matter, according to Democritus and Dalton.
  4. 8. There are different types of atoms. Each type of atom is called a(n) _______________.
  5. 9. The charge of a proton.
  6. 12. The scientist who discovered that atoms must have a positively charged nucleus.