Periodic Table

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Across
  1. 4. Man who firstly developed periodic table
  2. 5. Good conductors of electricity and heat
  3. 6. A repeating pattern of physical and chemical properties
  4. 7. Poor conductors of electricity and heat
  5. 9. Vertical columns of elements on the periodic table
  6. 10. ____ of the atom decreases as it moves from left to right
Down
  1. 1. Another name of groups
  2. 2. Horizontal rows of elements in the periodic table
  3. 3. ____ have both properties of metals and nonmetals
  4. 8. Man who rearranged periodic table by increasing atomic number