Checked content



English: Radium electroplated on a very small sample of copper foil and covered with polyurethane to prevent reaction with the air.
Source Own work
Author grenadier


I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
This file is licensed under the Creative Commons Attribution 3.0 Unported license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).

The following pages on Schools Wikipedia link to this image (list may be incomplete):


Learn more about Schools Wikipedia

Wikipedia for Schools was collected by SOS Children. SOS Childrens Villages works in 133 countries and territories across the globe, helps more than 62,000 children, and reaches over 2 million people in total. Would you like to sponsor a child?