Elements and Compounds

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Across
  1. 2. layers of different gases that surround the Earth
  2. 5. The chemical decomposition produced by passing an electrical current through a solution
  3. 6. The shortened version of the English or Latin name of an element
  4. 7. A pure substance that cannot be separated into simpler substances by chemical or physical means
  5. 10. A change that does not result in the formation of a new substance
  6. 13. These have a negative charge and orbit the nucleus
  7. 15. Smallest particle of an element
  8. 16. A pure substance made up of atoms of two or more elements that are chemically combined
Down
  1. 1. consists of all life on Earth and all parts of the Earth in which life exists, including land, water and the atmosphere
  2. 3. all of the water on Earth
  3. 4. A change that results in the formation of a new substance
  4. 8. Earth's solid rocky outer layer
  5. 9. The center of the atom which contains protons and neutrons
  6. 10. The formation of a solid in a solution
  7. 11. The particles of the nucleus that have no charge
  8. 12. smallest unit of most compounds
  9. 14. Positively charged particles in the nucleus