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Across 2. Reaction in which the material that starts the reaction is also one of the products & can then starts another reaction 3. Nuclear radiations follow the same conversation as the other chemical reactions 6. The electro magnet radiation or particles emitted from the nuclei 8. Is a reaction that affects the nucleus of an atom 12. Atom that is incorporated into a substance so that movement of the substance can be followed by a radiation detector 14. Process in which a very heavy nucleus splits into more stable nuclei of intermediate masses ( nuclear plants,nuclear factory) 15. Heaviest Nuclides 17. ! element into atoms of a diffrient element radioactive decay can help occur 18. energy that holds the protons together in the nucleus of an atom 19. involves the release of an alpha particle from its nucleus. 20. Produced by parent

Down 1. Atoms with low atoms #'s have 1 neutron for every proton provides the most stability 4. the emmision of a particle that has the same mass as an electrons 5. Process By which the approximate age of an object is determined based on the mass of certain radioactive nuclides present 7. the prices in which an inner ovbital electrons is captured by the nucleus of its own atom 9. The combining of nuclei with small masses to form a heavier stable nucleus ( sun,stars) 10. Series is tof radioactive nuclides produced by successive radioactive,decay a stable nuclide 11. The time required for that the original nuclei of a radioactive material to undergo radioactive decay 13. Release of gamma rays from nuclei 16. Involves the release of beta particle from nuclues