8 Matter and Energy U3 L2 The Periodic Table

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Across
  1. 4. The Periodic Table is in order of increasing by the number of protons
  2. 7. These are poor conductors of electricity ____
  3. 10. Each vertical column of elements on the periodic table is called a ____
  4. 12. The ____ line represents a separation between metals and nonmetals
  5. 13. The Periodic table contains ____ information about each of the elements
  6. 16. Elements in the same group will sometimes be called a ____
  7. 18. This is the weighted average of the masses of all the naturally occurring isotopes of that element ____ ____ ____
  8. 20. Silicon is an example of this ____
  9. 21. The horizontal rows of elements on the Periodic Table are called a ____
  10. 22. Elements on the Periodic table can be classified into ____ categories
Down
  1. 1. The Periodic table is a useful tool to scientists because it makes clear the many ____ of the elements' properties
  2. 2. This means it breaks easy
  3. 3. Properties of elements in a group are similar because the atoms of these elements have the same number of ____ electrons
  4. 5. This is an abbreviation for the element's name ____ ____
  5. 6. Iron is a good conductor of ____ energy
  6. 8. Most metals are ____ at room temperature
  7. 9. Valence electrons are found in the ____ portion of the electron cloud
  8. 11. The arrangements of elements ____ ___
  9. 14. Elements are ____ in order of increasing atomic number
  10. 15. Sodium has ____ valence electron
  11. 17. ____ gases glow brightly when an electric current is passed through them
  12. 19. The number of valence electrons helps determine what type of ____ reaction the atom can undergo