structure of matter

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Across
  1. 2. subatnces that are made by the chemical combination of two or more atoms in fixed proportions
  2. 4. smallest particle of element or compound that can mormally exist independently
  3. 6. two or more elements or componds are mixed together and there is no chemical reaction between them
  4. 7. used to represent elments
  5. 8. combining capacity of an elment or group
Down
  1. 1. number of atoms presnt in a molecule of an element
  2. 3. used to represnt compound
  3. 5. substance that is only made up of one kind of atom that cannot be broken into simpler substances by chemical methods
  4. 9. smallest particle of element taht can take part in a chemical reaction that may or may not exist independently