Gr 9 Chemistry Review

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Across
  1. 3. Has a different number of neutron than protons
  2. 8. All atoms want to become chemically/structurally stable by filling in the outer orbital
  3. 11. Mass number minus atomic number give you the number of ..
  4. 12. Most elements in the Periodic Table are ..
  5. 14. ion Na+
  6. 16. Electrons, Protons, Neutrons
  7. 21. Al
  8. 22. Horizontal row in the Periodic Table
  9. 24. The charge of an electron
Down
  1. 1. Atomic mass is 12
  2. 2. Vertical column in the Periodic Table
  3. 3. Charged atoms
  4. 4. Pure substance
  5. 5. Location of protons
  6. 6. Subatomic particle involved in chemical changes
  7. 7. The outer shell of electrons
  8. 9. Atomic number 20
  9. 10. Subatomic particle with a positive charge
  10. 13. Number of electrons in the first energy level(orbit) in Bohr-Rutherford diagrams
  11. 15. All members of this group are stable (unreactive)
  12. 17. Number of protons/electrons in the neutral atom
  13. 18. Lose electrons
  14. 19. This goes in the top left in Standard Atomic Notation
  15. 20. An ion with a negative charge has .... electrons
  16. 23. O2-