Chemistry Semester 1 Review

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Across
  1. 3. Who discovered the electron?
  2. 5. Protons held on inside while electrons move around them
  3. 7. Who discovered the neutron?
  4. 10. A single compound breaks down into 2 or more products
  5. 12. Arranged the periodic table based on mass
  6. 15. Shape created with 5 atoms
  7. 17. Negatively charged ion
  8. 18. Atoms of the same element with different amounts of neutrons
  9. 20. A property that does not depend on the amount of matter present
  10. 21. A property that depends on the amount of matter present
  11. 22. A model used to predict the geometry of molecules based on minimizing the electrostatic repulsion of a molecule's valence electrons around a central atom
  12. 23. 2 or more substances react to produce a single new substance
Down
  1. 1. A group of atoms that have a charge when together
  2. 2. Dissolves in water
  3. 4. Created by Rutherford and helped him discover the nucleus.
  4. 5. The ability of an atom to attract/pull in electrons
  5. 6. The distance from the nucleus to the boundary of the surrounding electron cloud
  6. 8. Positively charged ion
  7. 9. The energy necessary to remove an electron from a neutral atom
  8. 11. Has large particles floating; the only mixture that can be filtered
  9. 13. Heat energy is released
  10. 14. Used when naming covalent bonds
  11. 16. Heat energy is absorbed
  12. 19. Anything that can be separated using physical processes