Introducing the Periodic Table

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Across
  1. 4. Tungsten
  2. 5. This number represents how many protons are in the nucleus of an atom.
  3. 7. Bazooka Joe: "OK Atom, are you sure you lost an electron?" Atom: "Oh yes, I'm ____!"
  4. 9. Both Rb and Br belong to this block of predictable elements.(2)
  5. 11. A magical line on the PT separating elements into metals and non-metals.
  6. 12. All chemical symbols begin with this type of letter.
  7. 13. Maximum # of electrons permitted on Bohr's second energy level.
  8. 14. General name for an unreactive element with a full octet.(2)
  9. 15. Atoms of different elements combine in definite proportions to form millions of these.
  10. 17. Smallest piece of a compound.
  11. 18. Elements in the same group share similar ____ properties.
  12. 20. Electrons in the outermost energy level.
  13. 22. Smallest piece of an element.
  14. 23. Fancy PT word for a vertical "column".
  15. 24. Short forms for elements are called chemical ____.
  16. 25. Specific name for an atom or molecule that has lost electrons. Meow!
  17. 28. The subatomic particle that positively identifies an element.
  18. 29. A charged particle.
Down
  1. 1. Fancy PT word for a horizontal "row".
  2. 2. Number of valence electrons in a nitrogen atom.
  3. 3. Positive charge on any alkali earth metal ion.
  4. 6. Manganese resides in this block of multivalent elements.
  5. 8. Atoms with the same # of protons but different # of neutrons.
  6. 10. Gruff-looking Russian chemist responsible for the first PT.
  7. 16. Elements H, N, O, F, Cl, Br, and I all exist as this type of molecule.
  8. 17. ____ number - atomic number = number of neutrons.
  9. 19. Some lightbulbs contain elements from this group.
  10. 21. Roughly equal in size and mass to a proton, but without a charge.
  11. 26. AN ION with a negative charge.
  12. 27. More than half of the ____-transition elements are synthetic, and all are radioactive.