Bomb

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Across
  1. 7. A chemical element with symbol U and atomic number 92.
  2. 8. A reaction in which the material that starts the reaction is also one of the products and can start another reaction.
  3. 9. Alliance of Germany, Italy, and Japan during World War 2.
  4. 11. Alliance of Great Britain, Soviet Union, United States and France during World War 2.
  5. 12. An act of speaking to people with confidential, top secret information to see if they will secretly share it with another government.
  6. 14. The central core of an atom containing the protons and neutrons.
Down
  1. 1. "Lightning War" Type of fast-moving warfare used by German Forces against Poland in 1939
  2. 2. One that commits sabotage.
  3. 3. The techniques and skills used in espionage
  4. 4. The act of spying, especially government spy obtaining secrets of another government.
  5. 5. Energy formed by joining nuclei.
  6. 6. The breakdown of a radioactive element, releasing particles of energy.
  7. 10. Collapse, burning inward.
  8. 13. An economic system in which all means of production are owned by the people, private property does not exist and all goods and services are shared.