Chemistry review

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Across
  1. 5. A substance made of two or more atoms (of any type) chemically bonded together is called a...(8)
  2. 6. A substance made of only one type of atom is an...(7)
  3. 8. The metal elements in group 1 of the periodic table are the…(6,6)
  4. 10. A substance made of two or more different types of atom bonded in a specific ratio is a...(8)
Down
  1. 1. The way a substance behaves, what it is like or how it reacts is called a…(8)
  2. 2. A substance that speeds up a reaction without being used up is a…(8)
  3. 3. The non-metal elements in group 7 of the periodic table are the…(8)
  4. 4. For two substances to react then their particles must have a…(9)
  5. 7. The scientist who developed the modern day periodic table is Dmitri…(9)
  6. 9. The smallest type of particle that makes up all matter is an...(4)