Periodic Table Review

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Across
  1. 2. metal with 28 electrons
  2. 3. Element that has 26 protons
  3. 5. horizontal rows on the periodic table
  4. 6. Element in Group 17 often mistaken for the end of your pencil
  5. 7. A transition metal with 25 electrons
  6. 9. Metals that are found in groups 3-12 are called _____________ metals
  7. 11. A gas with atomic mass of 19; (hint: look in group 17)
  8. 15. Only element in group 17 that is a liquid
  9. 17. vertical columns on the periodic table
  10. 18. Group 17 elements are called __________.
  11. 20. Chart with all known elements
  12. 22. Noble gas with 2 electrons
  13. 23. Gas with 8 protons and 8 electrons
  14. 24. Only element in Group 1 that is not classified as an alkali metal
  15. 25. Silvery white metal used to make salt;found in Group 1
Down
  1. 1. Types of metals found in Group 1 of the periodic table
  2. 4. Center of an atom
  3. 8. Positively charged particles found in the nucleus of an atom
  4. 10. neutrally charged particles found inside the nucleus of an atom
  5. 12. Group 18 elements are called _______.
  6. 13. Transition metal with 30 electrons
  7. 14. element that as 20 neutrons and found in teeth and bones
  8. 16. Element with atomic number 53
  9. 19. Element that is a liquid at room temperature;symbol Hg
  10. 21. Negatively charged particles found in the nucleus of an atom