Atomic Structure and the Periodic Table

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Across
  1. 3. The lightest metal.
  2. 7. the scientist who proposed that atoms are a tiny dense positive nucleus surrounded by largely empty space and orbiting negative particles.
  3. 8. The most reactive metal
  4. 9. The Danish scientist who proposed a model of the atom in 1913.
  5. 10. An ion formed by losing an electron.
  6. 11. A charged atom.
  7. 13. The element discovered in and named for the Sun prior to being found on Earth.
  8. 15. Defined as the total number of protons for an element (6,5).
  9. 19. The subatomic component of atom that orbits the nucleus.
  10. 21. The columns on the periodic table.
  11. 22. The type of chemical bond where electrons are shared.
  12. 23. An ion formed by gaining an electron.
  13. 24. The type of bond where electrons are shared.
  14. 25. The scientist who created the first periodic table.
  15. 29. The first element discovered by Madame Curie.
  16. 30. Has 33 electrons on a neutral atom.
  17. 31. A row on the periodic table.
  18. 32. The chargeless particle in the nucleus atom.
  19. 33. an atom lacking electrons than has this charge.
Down
  1. 1. SO2 (6,7)
  2. 2. Has three valence electrons and three electron shells.
  3. 4. The most abundant element in the universe
  4. 5. The city where Madame Curie was born.
  5. 6. The positive component of an atom.
  6. 12. K
  7. 14. The chemical formula of Magnesium oxide
  8. 16. The ion with 17 protons and 18 electrons.
  9. 17. The number of protons + the number of neutrons (6,4).
  10. 18. The heaviest naturally occurring element.
  11. 20. The greek philosopher that proposed that matter has an indivisible subunit - the atom.
  12. 26. The solvent of the Earth's atmosphere.
  13. 27. How mane electrons can be held in the second shell.
  14. 28. an atom with excess electrons has this charge.