IPC - MT 5

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Across
  1. 5. type of decay in which an atom splits and emits an alpha particle consisting of two protons and two neutrons
  2. 7. the minimum amount of energy required to start a chemical reaction
  3. 9. big number out front of an element or formula used to balance chemical equations
  4. 10. type of reaction that requires the presence of oxygen
  5. 13. the breakdown of a radioactive element, releasing particles and energy
  6. 14. the splitting of a massive nucleus into smaller nuclei, releasing energy
  7. 16. a fat that is liquid at room temperature; found in vegetable oils, nuts, and seeds
  8. 17. the length of time required for half of the radioactive atoms in a sample to decay
  9. 18. elements or compounds that enter into a chemical reaction
Down
  1. 1. type of decay that releases gamma rays from a nucleus
  2. 2. element used for fusion energy produced by the sun
  3. 3. the process by which two or more small nuclei fuse to make a bigger nucleus
  4. 4. the SI base unit to measure the amount of a substance
  5. 6. the elements or compounds produced by a chemical reaction
  6. 8. the smallest possible mass of a fissionable material that can sustain a chain reaction
  7. 11. type of radioactive decay in which an electron is emitted
  8. 12. energy that is radiated or transmitted in the form of rays, waves, or particles
  9. 15. a substance that speeds up the rate of a chemical reaction but is not used up in the reaction