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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Describe and apply radioactivity using notes, video, and an interactive Gizmo Lab.
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.
1. Medical: Killing tumors, x-rays, MRI’s
2. Dating (Not your Girlfriend!)
to find out the age of substances (C14, O18)
D. Geiger Counter – used to detect radioactivity.
Original Isotope Remaining (%)
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**
2. Carbon-14 eventually decay’s into “Normal” Carbon-12.
Marie Curie Biography