6CHEM Unit 2 Vocab Practice

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Across
  1. 4. transition metal, expected charge of 2+, 4 electron shells
  2. 6. particle with no charge and same mass to a proton; found in the nucleus
  3. 7. atom or group of atoms that has a positive or negative charge
  4. 10. rare earth metals
  5. 15. the lonely element
  6. 16. positively charge particle with a mass of 1 amu
  7. 18. 4 valence electrons and 3 electron shells
  8. 19. 5 valence electrons and 4 electron shells
  9. 20. atoms usually want 8 valence electrons to be stable
  10. 21. area around the nucleus of the atom where electrons are most likely found
  11. 24. 1 valence electron and 2 electron shells
  12. 25. transition metal, expected charge of 2+, 5 electron shells
  13. 27. 2 core electrons, 8 valence electrons, charge of 2-
  14. 29. measure of electric charge (positive or negative) of an atom or molecule
  15. 31. less soft and less reactive than group 1 metals
  16. 34. metals in the middle of the periodic table
  17. 35. particles smaller than an atom
  18. 37. group 1, very reactive, soft, silver, shiny metals
Down
  1. 1. transition metal, expected charge of 1+
  2. 2. atomic mass of 247
  3. 3. radioactive metals
  4. 5. elements that are dull (not shiny) and poor conductors of heat and energy
  5. 8. electrons in the outermost energy level
  6. 9. contains nonmetals, extremely reactive and poor conductors
  7. 11. atomic number of 92
  8. 12. malleable and ductile elements, usually solid at R.T.
  9. 13. vertical column on the periodic table
  10. 14. least reactive elements (inert)
  11. 17. center of an atom
  12. 19. #p + #n = ___
  13. 22. horizontal row of elements in the periodic table
  14. 23. number of energy levels in an atom that matches the period or row of an element
  15. 26. elements that separate metals and nonmetals
  16. 28. atoms of the same element with a different number of neutrons/atomic masses
  17. 30. positively charge ion
  18. 32. average mass of all isotopes of an element
  19. 33. the number of protons in an atom
  20. 36. negatively charge particle with no mass
  21. 38. negatively charge ion