Periodic Table - Runnymede

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Across
  1. 3. a chemical _____ is found in a column on the periodic table
  2. 4. Dmitri _____ invented the modern periodic table
  3. 5. negatively charged particle in an atom
  4. 10. elements on the left side of the periodic table
  5. 11. _____ gases include neon and argon
  6. 13. two or more elements chemically joined
  7. 14. the smallest unit of an element
  8. 15. core of the atom
Down
  1. 1. Ag for silver is an example of an element _____
  2. 2. _____ earth metals are found in the second column of the periodic table
  3. 4. elements that have properties metals and non metals
  4. 6. neutral particle in the atoms nucleus
  5. 7. positively charged particle in an atom
  6. 8. pure substance that can not be broken down to simpler substances
  7. 9. elements found in the upper right corner of the periodic table
  8. 12. chemical family that includes fluorine and iodine