The Periodic Table (Ch 3)

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Across
  1. 3. The emission ________ is the 'fingerprint' of different colour patterns produced by an excited atom
  2. 4. Groups 17 elements
  3. 5. A molecule with two atoms
  4. 6. An alloy that can return to its original shape
  5. 7. At room temperature, ionic compounds form hard, brittle _________
  6. 9. Maximum number of electrons in the innermost shell
  7. 12. A mixture of two or more metals
  8. 13. John Newlands erroneously came up with the law of _________
  9. 15. Elements along the 'staircase' are called...
  10. 17. Group 18 elements are known as ________ ________
  11. 18. Word used to describe ions made of more than one atom
  12. 19. Magnesium is an ___________ earth metal
  13. 21. Groups in the periodic table have similar _________
  14. 23. Current model for the arrangement of electrons in an atom
  15. 24. Full name of the scientist who won 2 Nobel prizes for work on radiation
  16. 27. the periodic table is divided into vertical ________
  17. 28. Surname of the scientist who introduced chemical symbols
Down
  1. 1. The scientist who first proposed what elements were: Robert _______
  2. 2. Metals can often _________ electricity
  3. 3. An example of an alkali metal
  4. 7. Compounds formed by sharing electrons
  5. 8. Another name for an electron orbital is an electron _______
  6. 10. Surname of the man who first created the periodic table
  7. 11. Table used to organise elements
  8. 14. Name given to the outer shell of electrons in an atom
  9. 16. A property of metals that comes about because the atoms can move past each other easily
  10. 20. Maximum number of electrons in the third shell
  11. 22. Compounds formed by transferring electrons
  12. 25. Charged atoms
  13. 26. Groups 3-12 are ___________ metals