Elemental, My Dear Watson

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Across
  1. 3. The columns of the periodic table
  2. 7. Periodic table family containing Sodium, Rubidium, Cesium, Francium, Lithium, and Potassium
  3. 8. The act of emitting radiation spontaneously. Many elements with a higher number of protons are this word
  4. 9. The top row ot the F block; contained Lanthanum, Cerium, Europium, etc
  5. 13. The family located in Group 2
  6. 15. The family containing Bromine, Fluorine, Astatine, Chlorine, Iodine, and Tennessine
  7. 18. The only non reactive elements
  8. 19. 1st element found by Marie Curie; the most expensive element; named after Poland
  9. 20. Natural materials that do not produce heat or electricity and that are structurally brittle
Down
  1. 1. An element that has been used in bombs, paint, and ceramics
  2. 2. The characteristics that enable us to differentiate one material from another
  3. 4. The Family that stretches across group 3 to group 12
  4. 5. Created the first periodic table. Based his arrangement on atomic mass
  5. 6. An element who has properties of both metals and nonmetals
  6. 10. The bottom row of the F block; contains Actinium, Americium, Lawrencium, etc
  7. 11. The rows of the periodic table
  8. 12. An element found in every living thing
  9. 14. The electrons located in the outermost energy level of an atom
  10. 16. An atom that has lost or gained one or more electrons
  11. 17. Usually have a shiny metallic luster and reflective surface