THE PERIODIC TABLE

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Across
  1. 2. the periodic table was invented in year 18..
  2. 3. group .... contains beryllium, magnesium, calcium
  3. 5. the last name of the inventor of the periodic table
  4. 9. Group .... contains elements like helium,neon,argon
  5. 11. this chemical family of elements contains elements that don't react with other elements
  6. 15. alkali metals are very reactive with .... and may combust in its presence
  7. 17. The number, found in each element box on the periodic table, that contains a decimal
  8. 18. this chemical family of elements contains the most reactive metals.
  9. 20. The melting point in group 7 will increase as we go .... to the group
  10. 22. each row on the periodic table is called a ....
Down
  1. 1. .... is the only non-metal on the metal side of periodic table
  2. 4. is what do the symbols on the periodic table represent
  3. 6. these elements are found to the right of the staircase
  4. 7. .... is the most reactive non-metals
  5. 8. these elements are found to the left of the staircase
  6. 10. The columns of the periodic table are called ....
  7. 12. group .... contains fluorine, chlorine
  8. 13. The .... is the chart that organizes elements based on their increasing atomic number and their physical and chemical properties
  9. 14. The first name of the inventor of the periodic table
  10. 16. .... is the most reactive alkali metals
  11. 19. this is the whole number found in each element box on the periodic table
  12. 21. elements in group 7 will increase as we go .... to the group