Samuil Sobko

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Across
  1. 2. - composite particles consisting of two protons and two neutrons tightly bound together
  2. 4. - the smallest discrete unit of a phenomenon
  3. 5. - an energy level defined by quantum theory
  4. 7. - the act of emitting radiation spontaneously
  5. 10. - ions that are negatively charged
  6. 11. - a charged atom or molecule
Down
  1. 1. - the distance from one crest to another, or from one trough to another, of a wave
  2. 3. - represent the reactants and products in radioactive decay, nuclear fission, or nuclear fusion
  3. 6. - ions that are positively charged
  4. 8. - a tiny particle that comprises waves of electromagnetic radiation
  5. 9. - energy that comes from a source and travels through space at the speed of light