Physical Science FOR DUMMIES!

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Across
  1. 2. mass average mass of all isotopes
  2. 6. different number of neutrons but atoms of the same element
  3. 8. table a table of the arrangement of elements
  4. 10. salt forming
  5. 12. smallest particle of an element
Down
  1. 1. gases don't normally form compounds
  2. 3. a material that can be shaped into other shapes
  3. 4. element which lacks the properties of a metal
  4. 5. a material which can be pulled into a wire
  5. 7. elements elements that are good conductors of the electric and & heat
  6. 9. Symbol a symbol of the element condensed into one or two letters
  7. 11. positive charged atoms clustered into a center