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Radioactive Decay. Radioactivity vs. chemical reactions. CHEMICAL REACTIONS make new substances by rearranging atoms and forming bonds. The atoms do not change in the process. NUCLEAR REACTIONS instead involve a change in the nucleus and changes the atom…forming a different element.

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Radioactive Decay


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radioactivity vs chemical reactions
Radioactivity vs. chemical reactions
  • CHEMICAL REACTIONS make new substances by rearranging atoms and forming bonds. The atoms do not change in the process.
  • NUCLEAR REACTIONS instead involve a change in the nucleus and changes the atom…forming a different element.
what is radioactivity
What is Radioactivity?
  • By late 1890s scientists noticed some substances spontaneously emitted radiation and called it RADIOACTIVITY.
  • The particles emitted were called RADIATIONwhere atoms change their identity in the process.
  • Radioactivity happens because of unstable nuclei break down to more stable forms.
  • This process is called RADIOACTIVE DECAY.
types of radiation
TYPES OF RADIATION?

1) ALPHA: Each alpha particle emits 2 protons and 2 neutrons.

What element is this equivalent to???

If Radium (Ra) -226 which has an atomic number of 88 and undergoes a decay of an alpha particle, how many protons will the new element have?

What element will it turn into?

What will the resulting mass be?

beta radiation
BETA RADIATION:
  • Radiation that consists of fast moving negative particles called BETA PARTICLES.
  • MASS OF THE ELEMENT DOES NOT CHANGE.
  • THE ATOMIC NUMBER INCREASES BY 1.
  • IF Carbon 14 has an atomic number of 6, and a beta particle was released…

- WHAT WOULD THE RESULTING ELEMENT BE?

gamma radiation
Gamma Radiation
  • High energy radiation that has no mass and no electric charge
cool nuclear sites
COOL NUCLEAR SITES
  • http://people.chem.duke.edu/~jds/cruise_chem/nuclear/nuclear.htm
  • Where would you like to go to learn more???
  • Radioactivity : The Pros and Cons
  • Everyday Exposure to Radiation
  • Modern Uses of Radioactive Isotopes
  • Detection of Radiation and your Protection
  • The Discovery of Radioactivity
  • Nuclear Stability and Radioactive Decay
  • Other Radioisotopes Found in Everyday Life
  • Shedding Light on Some Common Misconceptions and Fears
  • Social, Economic, and Political Concerns