Per10_over - Preview of Period 10: 10.1 Ionizing Radiation...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Preview of Period 10: 10.1 Ionizing Radiation What types of particles are emitted when radioactive atoms decay? 10.2 How is Ionizing Radiation Detected? Why does the Geiger counter measure counts when no radioactive source is placed nearby? 10.3 Nuclear Decay Why do some nuclei decay and other nuclei do not? 10.4 How do Nuclei Decay? Which conservation laws govern nuclear decay? 10.5 What is the Standard Model of Particle Physics? What is the composition of fundamental particles? How are fundamental particles bound together? 10-1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Which nuclei are stable? Stable nuclei have 83 or fewer protons. the same number of protons and neutrons for light elements with 20 or fewer protons. more neutrons than protons for elements with more than 20 protons. What happens to unstable nuclei? Unstable nuclei become more stable by changing protons into neutrons or neutrons into protons. As unstable nuclei decay, they give off ionizing radiation. Materials containing atoms with unstable nuclei are radioactive. The radiation the nuclei give off is some combination of alpha, beta, or gamma particles, depending on the nuclear reaction. 10- 2
Background image of page 2
Ionizing Radiation Radiation refers to anything radiates outward from a source. (Example: electromagnetic radiation – radio waves, microwaves, infrared radiation, visible light, etc.) Ionizing radiation is radiation that strips electrons from atoms, turning the atoms into charged ions. Unstable nuclei can give off these types of ionizing radiation: Alpha particles α are helium nuclei He 4 2 (2 neutrons and 2 protons) Beta particles are β electrons e 0 1 or β + antielectrons e 0 1 + Gamma particles γ are very high energy photons. 10- 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Summary of Ionizing Radiation Radiation Particle emitted A= # of nucleons Z= # of protons Electric Charge alpha α helium nuclei He 4 2 4 2 +2 beta β - electron (e ) 0 0 -1 beta β + antielectron (e + ) 0 0 +1 gamma γ high energy photon 0 0 0 10-4b
Background image of page 4
Summary of Ionizing Radiation Radiation Particle emitted A= # of nucleons Z= # of protons Electric Charge alpha α helium nuclei He 4 2 beta β - electron (e ) beta β + antielectron (e + ) gamma γ high energy photon 10-4a
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 15

Per10_over - Preview of Period 10: 10.1 Ionizing Radiation...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online