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Radioactive Decay

Radioactive Decay. Radioactive Decay. Radioactive decay results in the emission of either:. an alpha particle ( a ),. a beta particle ( b ),. or a gamma ray (g). Alpha Decay. An alpha particle is identical to that of a helium nucleus. It contains two protons and two neutrons. A.

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Radioactive Decay

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  1. Radioactive Decay www.assignmentpoint.com

  2. Radioactive Decay Radioactive decay results in the emission of either: • an alpha particle (a), • a beta particle (b), • or a gamma ray(g). www.assignmentpoint.com

  3. Alpha Decay An alpha particle is identical to that of a helium nucleus. It contains two protons and two neutrons. www.assignmentpoint.com

  4. A A - 4 X Y + Z Z - 2 4 He 2 Alpha Decay unstable atom alpha particle more stable atom www.assignmentpoint.com

  5. 226 222 Ra Rn 88 86 4 He 2 Alpha Decay www.assignmentpoint.com

  6. + A - 4 Y A X Z - 2 Z 4 4 226 222 He He Ra Rn + 2 2 88 86 Alpha Decay www.assignmentpoint.com

  7. 222 Rn + 86 A Y Z 222 218 4 4 4 Rn Po He He He + 86 84 2 2 2 Alpha Decay www.assignmentpoint.com

  8. A X + 230 Th Z 90 234 230 4 4 4 U Th He He He + 92 90 2 2 2 Alpha Decay www.assignmentpoint.com

  9. 230 230 Th Th + A Y 90 90 Z 226 4 4 4 Ra He He He + 88 2 2 2 Alpha Decay www.assignmentpoint.com

  10. A 218 X Po + 214 Pb Z 84 82 214 4 4 4 Pb He He He + 82 2 2 2 Alpha Decay www.assignmentpoint.com

  11. Beta Decay A beta particle is a fast moving electron which is emitted from the nucleus of an atom undergoing radioactive decay. Beta decay occurs when a neutron changes into a proton and an electron. www.assignmentpoint.com

  12. Beta Decay As a result of beta decay, the nucleus has one less neutron, but one extra proton. The atomic number, Z, increases by 1 and the mass number, A, stays the same. www.assignmentpoint.com

  13. 218 218 Po At 84 85 0 b -1 Beta Decay www.assignmentpoint.com

  14. A A 0 0 b b X Y + Z Z + 1 -1 -1 218 218 Po Rn + 84 85 Beta Decay www.assignmentpoint.com

  15. 234 A 0 0 b b Th Y + 90 Z -1 -1 234 234 Th Pa + 90 91 Beta Decay www.assignmentpoint.com

  16. A 210 0 0 b b X Pb + Z 82 -1 -1 210 210 Tl Pb + 81 82 Beta Decay www.assignmentpoint.com

  17. 210 A 0 0 b b Bi Y + 83 Z -1 -1 210 210 Bi Po + 83 84 Beta Decay www.assignmentpoint.com

  18. A 214 0 0 b b X Bi + Z 83 -1 -1 214 214 Pb Bi + 82 83 Beta Decay www.assignmentpoint.com

  19. Gamma Decay Gamma rays are not charged particles like a and b particles. Gamma rays are electromagnetic radiation with high frequency. When atoms decay by emitting a or b particles to form a new atom, the nuclei of the new atom formed may still have too much energy to be completely stable. This excess energy is emitted as gamma rays (gamma ray photons have energies of ~ 1 x 10-12 J). www.assignmentpoint.com

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