Periodic Table

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Across
  1. 2. I am a noble gas that has a atomic number of 86.
  2. 4. I am the only element in the halide family that is a liquid.
  3. 8. I am a Lanthanoid metal with an atomic mass of 140.116 amu.
  4. 9. I am a gas with a mass number of 19.
  5. 10. Group one is called the ___ metal group.
  6. 11. Metals that do not conduct electricity or heat very well.
  7. 12. I am a halogen that has an atomic mass of 35.4527 amu.
  8. 14. Very reactive because there oxidation number is +2.
  9. 17. I am a metal that is liquid at room temperature.
  10. 19. Have properties of both metals and non-metals.
  11. 23. My atomic number is 33.
  12. 24. Group 17 is called the ___ group.
  13. 25. Elements is arranged in order of _______ atomic weight.
  14. 26. there are __ groups on the periodic table.
Down
  1. 1. I am a noble gas with 2 electrons.
  2. 3. I make up 78% of the air and am found in the 15th group.
  3. 5. I am a gas with 8 protons and 8 neutrons.
  4. 6. A group is a _______ column in the periodic table.
  5. 7. The term "halogen" means.
  6. 8. I have 20 neutrons and am found in your bones.
  7. 13. Group two is called the ____ earth metals.
  8. 15. They are the 18th group on the periodic table.
  9. 16. The biggest group of elements in periodic table is called the __________ metals group.
  10. 18. There are ___ noble gases found in group 18 on the periodic table.
  11. 20. My atomic number is 3.
  12. 21. All halogens have ___ electrons in their outer shells.
  13. 22. I am a transition metal with 25 electrons.
  14. 27. My atomic number is 79.