THE ELEMENTS

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Across
  1. 3. Chemical symbol for calcium.
  2. 5. element with 16 protons, 16 neutrons, and 16 electrons.
  3. 8. member of Oxygen Family located in period 2.
  4. 10. Family of elements that have 7 valence electrons.
  5. 11. Transitional metal with a mass number of 195.
  6. 15. Only element with 2 valance electrons giving it a full valence shell.
  7. 16. Most reactive family of metals (2 words).
  8. 19. Transitional metal with an atomic mass of 52.00.
  9. 21. Element in period 2 that forms a 1+ ion.
  10. 22. Transitional metal that is a liquid at room temperature.
  11. 23. Most reactive alkali-earth metal.
  12. 24. Only metalloid to also be a family name.
  13. 25. Head of family with 5 valence electrons.
Down
  1. 1. Only element with no neutrons.
  2. 2. Transitional metal with 79 protons.
  3. 4. Only metalloid belonging to the Halogen Family.
  4. 6. Member of the alkali-earth metals found in period 2.
  5. 7. Most reactive alkali metal.
  6. 9. family that does bond with other atoms (2 words).
  7. 12. Alkali metal with 20 neutrons.
  8. 13. name for elements 89 - 103.
  9. 14. Radioactive element with 94 electrons.
  10. 17. Halogen with 53 protons.
  11. 18. Element in both period 5 and group 13.
  12. 19. Element whose chemical symbol is "Cl".
  13. 20. Noble Gas with a mass number of 84.