C1 Revision - SHA

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Across
  1. 3. Used in chromatography to dissolve a compound.
  2. 6. Gas released when a group 1 metal reacts with water.
  3. 10. Filtration and ___ can be used to separate rock salt.
  4. 12. As you descend group 7 the elements become ___ reactive.
  5. 14. A vertical column in the periodic table.
  6. 15. Another name for group 0 gases.
  7. 17. Group 1 metals are very ___.
  8. 18. The charge of a nucleus.
  9. 20. Two or more elements bonded together.
  10. 21. Bromine will do this to iodine.
  11. 23. As you descend group 1, the reactivity ____.
  12. 25. The particles scattered from a gold nucleus in Rutherford's experiment.
  13. 27. The number of protons is the ___ number.
Down
  1. 1. American billionaire and owner of Wayne Enterprises.
  2. 2. The number of electrons is ___ to the number of protons in an atom.
  3. 3. When positive nuclear charge is blocked by electron shells.
  4. 4. The element with electron configuration 2,8.
  5. 5. Bohr concluded electrons were arranged in ___.
  6. 7. An atom is ___, unlike an ion.
  7. 8. This scientist showed the plum pudding model was wrong.
  8. 9. Effective mass of an electron.
  9. 11. Filtration separates ____ solids from liquids.
  10. 13. Same number of protons but different number of neutrons.
  11. 16. A red-brown halogen.
  12. 19. The number of electrons held in the first shell.
  13. 22. The element with electron configuration 2,8,8,2.
  14. 24. The number of electrons held in the second or third shell.
  15. 26. The modern periodic table is in order of ___ number.