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Ian page 59 RADIOACTIVITY

Ian page 59 RADIOACTIVITY. Objective. Main Ideas Radioactivity Half-life Radioactive Decay Marie Curie. Describe and apply radioactivity using notes, video, and an interactive Gizmo Lab.

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Ian page 59 RADIOACTIVITY

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  1. Ian page 59RADIOACTIVITY Objective • Main Ideas • Radioactivity • Half-life • Radioactive Decay • Marie Curie Describe and apply radioactivity using notes, video, and an interactive Gizmo Lab.

  2. I. Radioactivity - Process where the nucleus of an atom releases energy and particles Neutrons and/or Protons. A. Marie Curie (1867-1934) Isolated radioactive elements. (Radium, Polonium, Thorium) B. Heavier elements and most Isotopes tend to be radioactive.

  3. C. Radioactive uses 1. Medical: Killing tumors, x-rays, MRI’s 2. Dating (Not your Girlfriend!) to find out the age of substances (C14, O18)

  4. D. Geiger Counter – used to detect radioactivity.

  5. Radioactive Decay 100 50 Original Isotope Remaining (%) 25 12.5 4 0 1 2 3 Number of half-lives = new element = original element E. Radioactive Decay = Time required for Half of a particular element to change to a more stable atom. **THIS IS KNOWN AS HALF-LIFE**

  6. 1. Uranium half-life = 4.47 billion years! 2. Carbon-14 eventually decay’s into “Normal” Carbon-12.

  7. IAN PAGE 58 Marie Curie Biography Ariticle

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