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Exploring Motion Graphs with Promethium and Technetium

Learn about motion graphs and the elements Promethium and Technetium. Understand flat, steep, and shallow lines on position vs. time graphs. Discover the unique properties of Promethium and its historical uses. Find out about stable isotopes and practical applications in luminous paints. Access engaging warm-up activities and smart graph exercises.

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Exploring Motion Graphs with Promethium and Technetium

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  1. Warm up 02-19-14 • Question: What does a flat line on a position vs. time graph mean? Steep? Shallow? • Answer: • Flat = not moving • Steep = fast • Shallow = slow • Goal: I will use a motion sensor to create and interpret graphs.

  2. Element of the day • 61 – Promethium – Pm • Promethium, along with technetium (43) are the only two elements under 83 that have no stable isotopes. • Promethium was once used to create paint for luminous dials, but was replaced by tritium (an isotope of hydrogen). Tritium’s radiation is contained by the glass tubes it is kept in, and if they do break, it is lighter than air, so it floats away. Promethium does not have these advantages.

  3. Collect Warm ups • Smart Graphs Activities • Tonight’s HW • Pg BB & CC Agenda / HW

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