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How to Make a Model of Radium

    • 1). Locate the center of your poster board sheet. Mark it with an X. Draw 8 concentric circles around the mark. The first circle has a radius of 1 inch. The others increase in radius by 1/2 inch each.

    • 2). Color the first circle with a yellow marker. This is the nucleus. Color the other circles with other colors. They represent the electron shells.

    • 3). Glue 2 beads into the electron shell closest to the nucleus. Glue 8 into the next, then 18, 32, 18, 8 and 2.

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