ASSIGNMENTS

1. ASSIGNMENTS 1.) Read p.292-297 (Radioactivity) 2.) Complete “Types of Radiation” WS (Chap 10.1 Reading Organizer) 3.) p.297 Assessment Questions 1-9

2. Radioactivity Notes Tim F. Rowbotham 2010

3. Radioactivity Intro Video “Final Above Ground Atomic Tests”

4. Nuclear Stability In the nucleus, protons and neutrons are held together by the strong nuclear force. It overcomes the weaker electric force of repulsion.

5. Nuclear Instability But some atoms have unstable nuclei. The strong force is not great enough. Their nuclei have a tendency to “fallapart” a bit due to this instability.

6. Nuclear Radiation Unstable nuclei will jettison some particles or energy in order to become more stable.

7. Nuclear Radiation The particles or energy ejected from the nucleus of an atom is what we call nuclear radiation.

8. Radioactive Elements Radioactive elements are those atoms that have unstable nuclei, thus would eject particles or energy from their nuclei. They are called radioactive isotopes, or radioisotopes for short.

9. Radioactive Decay When an atom gives off nuclear radiation, we call the process radioactivity or nucleardecay. During nuclear decay, an atom may change into an entirely new element. (Remember, the number of protons is what determines the type of atom.)

10. Learning Check READY YOUR REMOTE

11. What causes radioactivity? • A chemical reaction • An unstable nucleus • The earth’s magnetic field • The jet stream

12. An element that gives off radiation is called • an ion • a molecule • an isotope • a radioisotope

13. Radioactivity Video Clip - Radioactivity

14. Nuclear Decay Products Through nuclear decay, an element can change to another element, so we refer to the initial radioisotope as the parent and the element it becomes as the daughter product. PARENT  Radiation + DAUGHTER

15. Parent & Daughter Elements

16. Sample Parent & Daughters PARENT  Radiation + DAUGHTER Ra-226  α + Rn-222 U-238  α + Th-234 Th-234  β + Pa-234 C-14  β + N-14 K-42  β + Ar-42

17. Learning Check READY YOUR REMOTE

18. The new element formed after the decay of the radioisotope is referred to as the • Parent element • Daughter element • Created element • Nuclear element

19. The radioisotope giving off radiation is referred to as the • Parent element • Daughter element • Created element • Nuclear element

20. Types of Nuclear Radiation There are 3 common types of nuclear radiation: ALPHA PARTICLES BETA PARTICLES GAMMA RAYS

21. Alpha Decay In alpha decay, an alpha particle is released from the nucleus. An alpha particle is 2 protons attached to 2 neutrons. It is the same as a helium nucleus.

22. Alpha Decay education.jlab.org/glossary/alphadecay.htm

23. Alpha Decay http://santasusana.org/pakelly/G%20Chemistry/changes_in_the_nucleus.htm

24. Alpha Decay http://www.umich.edu/~radinfo/introduction/lesson/alpha.htm

25. Alpha Decay http://www.hk-phy.org/resources/images/atomic01/?N=A

26. Quick Review READY YOUR REMOTE

27. What does an alpha particle consist of? • An electron • A proton • A proton & a neutron • 2 protons & 2 neutrons

28. What causes radioactivity? • A chemical reaction • An unstable nucleus • The earth’s magnetic field • The jet stream

29. The new element formed after the decay of the radioisotope is referred to as the • Parent element • Daughter element • Created element • Nuclear element

30. ASSIGNMENTS 1.) RETURN REMOTE 2.) Complete PACKET pages 10-11 “Radioactive Elements” 3.) Video: The Manhattan Project

31. VIDEO Video: The Manhattan Project

32. Quick Review READY YOUR REMOTE

33. The new element formed after the decay of the radioisotope is referred to as the • Parent element • Daughter element • Created element • Nuclear element

34. What causes radioactivity? • A chemical reaction • An unstable nucleus • The earth’s magnetic field • The jet stream

35. An element that gives off radiation is called • a radioisotope • an ion • a molecule • an isotope

36. Quick Review 1.) VIDEO CLIP – Atomic Bomb 2.) Turn to page 3 of your notes

37. Beta Decay In beta decay, a beta particle is released from the nucleus. A beta particle is really an electron. During beta decay, a neutron changes into a proton and electron. The proton stays and the electron is jettisoned from the nucleus.

38. Beta Decay education.jlab.org/glossary/betadecay.htm

39. Beta Decay http://santasusana.org/pakelly/G%20Chemistry/changes_in_the_nucleus.htm

40. Beta Decay www.physics.isu.edu/adinfbeta.htm

41. Beta Decay http://www.hk-phy.org/resources/images/atomic01/?N=A

42. What is a beta particle? • An electron • A proton • A proton & a neutron • 2 protons & 2 neutrons

43. Gamma Decay In gamma decay, no particle is released by the nucleus – only energy!! Gamma decay, by itself, does not change the atom into a new element. Gamma decay often accompanies alpha or beta decay.

44. Gamma Decay http://santasusana.org/pakelly/G%20Chemistry/Gammae.gif

45. Gamma Decay http://www.umanitoba.ca/faculties/medicine/radiology/stafflist/staffitems/RADPRO%20Course/radiation.htm

46. Gamma Decay http://www.newworldencyclopedia.org/entry/Gamma_ray http://www.odec.ca/projects/2007/pete7o2/Background.html

47. Quick Review READY REMOTES

48. What does an alpha particle consist of? • An electron • A proton • A proton & a neutron • 2 protons & 2 neutrons

49. What does a beta particle consist of? • An electron • A proton • A proton & a neutron • 2 protons & 2 neutrons

50. ASSIGNMENTS 1.) RETURN REMOTE 2.) All About Radiation Worksheet