periodic table labs

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Across
  1. 1. ______-metal are extremely soft
  2. 3. semi_______ property of metalloids
  3. 5. ______-gases colorless, oderless, tasteless
  4. 6. alkaline earth type metal
  5. 8. _________-metals good conductors for electricity for heat
  6. 11. made periodic table by atomic number
  7. 12. Russian chemist who made periodic table by mass
Down
  1. 1. _________-metals oxidize in air
  2. 2. first piriodic table by atomic mass was not given credit due to incompleteness
  3. 3. nonmetal with 6 protons
  4. 4. property of nonmetals
  5. 7. metalloid with 4 protons
  6. 9. property of metals
  7. 10. most reactive nonmetal