Chemistry

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Across
  1. 3. the smallest indivisible part of matter
  2. 4. this table contains a list of all known elements
  3. 7. a subatomic particle with a neutral charge
  4. 9. a group of elements in the periodic table that are good conductors of heat and electricity
  5. 10. the general name given to the substances at the start of a chemical reaction
  6. 11. a group of elements in the periodic table that are poor conductors of electricity and heat
  7. 13. the general name given to a substance that results from a chemical reaction
  8. 15. a substance containing two or more elements chemically bonded
  9. 16. the centre of an atom containing protons and neutrons
  10. 17. a pure substance made of only one type of atom
Down
  1. 1. a subatomic particle with a positive charge
  2. 2. anything that takes up space or has mass
  3. 5. a subatomic particle with a negative charge
  4. 6. this is characterised by a temperature or colour change, or light
  5. 8. elements with the characteristics of both metals and non-metals
  6. 12. a combination of two or more substances that are not chemically bonded
  7. 14. a group of atoms bonded together of the same or different elements