Chemistry: Periodic Table

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Across
  1. 2. What made the piriodic table really useful was it use for __________ chemicals
  2. 4. elements in a group have a similar chemical _______
  3. 5. The seven horizontal rows on the periodic table are called ___
  4. 7. Fewer than _____ elements were discovered by the mid 1800
  5. 10. metallic elements are good ________ of heat and electricity
  6. 11. the atomic number is the number of _______ in the nucleus of an atom
  7. 12. Scientists use it to organize chemicals
Down
  1. 1. Moseley organized his periodic table by_______
  2. 3. nonmeatals are _____ for heat and electricit
  3. 6. I 1913, ______ made a major change to the periodic table
  4. 8. The vertical column of elements is called a _______ or a family
  5. 9. He suggested that _________ were more useful for chemical behavor that atomic mass