Simple science

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Across
  1. 2. organ which produces Nile
  2. 4. Father of nuclear chemistry
  3. 6. a unit of thermal energy
  4. 8. different forms of an element
  5. 11. important sugar present in honey
  6. 13. other names for alkane
  7. 14. a disease caused due deficiency of vitamin
  8. 15. what is commonly used plastic to make gear wheels
Down
  1. 1. which waves are used for communication in artificial satellites
  2. 3. the longest bone in the human body
  3. 5. blood vessels with smallest diameter
  4. 7. an alloy of Copper and Zinc
  5. 9. what is used to split light into different colours
  6. 10. vitamin C deficiency disease
  7. 12. nuclear reactors are based on which phenomenon?