Periodic Table

123456789101112131415161718
Across
  1. 1. This element is the second smallest element.
  2. 4. This is the magic number of valence electrons that makes most atoms happy.
  3. 5. This element has a symbol of Kr.
  4. 8. This element has an atomic number of 20.
  5. 10. This element is located in period 5 and group 11.
  6. 11. This element has a rounded mass of 64.
  7. 13. Ta (Tantalum) is in which group?
  8. 15. If a molecule has 2 or more different kinds of atoms it is called a __.
  9. 16. This element is in period 3 and has a rounded mass of 40.
  10. 17. Zn is the symbol for which element?
Down
  1. 2. Oxygen has __ protons.
  2. 3. Fluorine has __ neutrons. (hint: mass - protons = neutrons)
  3. 6. Lithium has __ valence electrons.
  4. 7. Neon is a happy/sad element?
  5. 9. What element has an atomic number of 6?
  6. 10. Fluorine has __ valence electrons.
  7. 12. A water molecule is made of 2 hydrogen atoms and 1 __ atom.
  8. 14. This element is located in period 6 and group 14.
  9. 18. What do you call an atom that is not neutral?