The Periodic Table

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Across
  1. 2. -organized the periodic table by Atomic Mass. He published the first periodic table in 1869
  2. 6. better conductors than non-metals but not as good as metals
  3. 7. Dull, Brittle,and poor conductors of heat and electricity.
  4. 8. discovered that electrons exist in distinct energy levels.
Down
  1. 1. subatomic particles that has no charge and has the same mass of a proton
  2. 3. are shiny and Ductile and good conductors of electricity.
  3. 4. under the category of Subatomic Particles which are Protons and Neutrons,and Electrons
  4. 5. positively charged Subatomic Particles