Chemistry 9 (Sec 2) - no spaces

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Across
  1. 2. equivalent to the number of protons and neutrons in an atom
  2. 3. the scientist with the model of the atom that looks like a billiard ball
  3. 6. Reactive metals on the periodic table and found in group 2
  4. 10. scientist with the model of the atom with a positively charged sphere with negatively charged electrons embedded in it
  5. 12. positively charges particle in the nucleus
  6. 14. The number of neutrons fluorine has
  7. 17. a material that is shiny, malleable, ductile and usually grey or silver in color
  8. 18. neutral charge found in the nucleus
Down
  1. 1. The most reactive nonmetals on the periodic table
  2. 4. This model of the atom is used in high school. it contains electrons in energy levels surrounding the nucleus that contains protons and neutrons
  3. 5. Potassium belongs to this group of metals on the periodic table
  4. 7. The number of protons is also known as the
  5. 8. elements with properties of both metals and nonmetals
  6. 9. The element found at Group 15 period 2
  7. 11. Scientist who discovered the nucleus in the atom
  8. 13. the most stable family/ group on the periodic Table
  9. 15. negatively charged particle orbiting the nucleus
  10. 16. found on the right side of the staircase on the periodic table.