Colton Butcher Period 10

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Across
  1. 4. in chemistry, a horizontal row of elements in the periodic table
  2. 8. a one-,two-, or three-letter abbreviation of the name of an element
Down
  1. 1. the weighted average of the masses of all naturally occurring isotopes of an element
  2. 2. a vertical column of elements in the periodic table
  3. 3. an arrangement of the elements in order of their atomic numbers such that elements with similar properties fall in the column,or group
  4. 5. an element that conducts heat and electricity poorly
  5. 6. an element that has properties of both metals and nonmetals
  6. 7. an element that is shiny and conducts heat and electricity well