Elements & The Periodic Table CW 2

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Across
  1. 3. located in the outermost shell of an atom
  2. 5. amount of matter in an object
  3. 8. elements in group 17 of the periodic table that need only one electron to complete its outer electron shell
  4. 9. the ability for metal to be drawn into wires
  5. 10. the number of valence electrons for each element in Group 1
  6. 13. Characteristics of elements that help to identify what they are.
  7. 15. The average mass of the nucleus of that element.
  8. 18. A subatomic particle of an atom that is negatively charged and orbits the nucleus extremely fast.
  9. 20. matter with a composition that is always the same
  10. 22. someone who studies chemistry
  11. 28. the amount of mass a material has in a given volume
  12. 29. a group of two or more atoms held together by chemical bonds
  13. 30. elements that have some properties of metals and some properties of nonmetals
  14. 33. A subatomic particle with no charge located at the center of an atom.
  15. 35. elements in group 2 of the periodic table that are characterized as metals and only have two valence electrons
  16. 37. the elements in group 14
  17. 38. the elements located in Group 3 through 12
  18. 40. the ability of an object to carry electric currents
Down
  1. 1. the ability of an object to transfer heat
  2. 2. elements in group 1 of the periodic table that are characterized as metals and only have one valence electron
  3. 4. Elements arranged in vertical columns of the periodic table that share the same properties.
  4. 6. Repeating rows of the periodic table that demonstrate patterns of how elements are arranged.
  5. 7. when an element has more than one possibility for the number of neutrons
  6. 11. an element that lacks most of the properties of a metal
  7. 12. An abbreviation for the name of an element on the periodic table.
  8. 14. Elements that are good conductors of electricity and thermal energy and are often solid at room temperature.
  9. 16. the ability for metal to be hammered, pressed or rolled into thin sheets
  10. 17. The number of protons in the nucleus of each element.
  11. 19. substances that can conduct electric currents under some conditions but not under other conditions
  12. 21. scientist that discovered a set of patterns that applied to all elements
  13. 23. anything that has mass and takes up space
  14. 24. A positively charged subatomic particle located at the center of an atom.
  15. 25. a pure substance that cannot be broken down into any other substance by chemical or physical means
  16. 26. force between atoms or groups of atoms
  17. 27. the elements in group 15
  18. 31. the elements in group 16
  19. 32. elements in group 18 of the periodic table that share similar properties such as a full outer electron shell
  20. 34. the elements in group 13
  21. 35. the basic particle from which all elements are made
  22. 36. the shine of a metal
  23. 39. number of valence electrons for each element in Group 2