Luiza's Crossword

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Across
  1. 2. A atom that has an atomic number of 6
  2. 5. A chemical reaction where a substance reacts with oxygen or an oxiding substance
  3. 7. A scientific thing that contains protrons, electrons and neutrons in it
  4. 9. A atom that has an atomic number of 7
  5. 10. Is when a compound is heated and breaks down into smaller products
  6. 11. A change that is easily reversible
  7. 13. When copper reacts with oxygen it forms ...
  8. 14. Shows the number of atoms of each element in a compound
  9. 15. Is the region surrounding an atom's nucleus where electrons, protons and neutrons are likely to be found
Down
  1. 1. Is a new substance formed as a result of a chemical reaction
  2. 2. A process that involves the formation of bonds between atoms to form a new substance
  3. 3. Are the materials in a chemical reaction. They can be thought of as the chemical ingredients of the reaction
  4. 4. When 2 or more elements are bounded together
  5. 6. Atoms of the same element with the same number of protons but different number of neutrons
  6. 8. Elements with physical and chemical properties intermediate between metals and non-metals
  7. 12. Is the burning of a substance in the presence of oxygen/the scientific word for fire
  8. 14. A change that is not easily reversible