Radioactivity

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Across
  1. 2. The process of a nucleus losing energy by emitting radiation
  2. 3. A nuclear process where an atom's nucleus splits into smaller, lighter nuclei.
  3. 4. An element with a Ra symbol
  4. 6. A type of radioactive decay in which an electron is emitted
  5. 8. Founder of Radium
  6. 9. High-energy radiation emitted by radioactive decay
  7. 10. a version of an element with the same number of protons but a different number of neutrons
Down
  1. 1. The emission of radiation from an unstable atomic nucleus.
  2. 5. A widely used fuel source
  3. 7. neutral subatomic particle