Chemistry

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Across
  1. 3. positively charged particle
  2. 5. element with 17 protons
  3. 6. First step in the scientific method
  4. 10. negatively charged particle
  5. 11. thing on the periodic table
  6. 13. element with 3 protons
  7. 14. same element, different number of neutrons
  8. 15. state of matter with no definite shape or volume
Down
  1. 1. homogeneous mixture
  2. 2. state of matter with a definite shape and volume
  3. 4. what class is this
  4. 7. 4th step in the scientific method
  5. 8. neuterally charged particle
  6. 9. neutron+proton
  7. 12. state of matter with no definite shape but a definite volume