These Crosscutting Concepts and Science and Engineering Practices provide a comprehensive approach to understanding and teaching the principles of radioactivity within the framework of the NGSS.

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The element radium can be found in extremely tiny amounts in the Earth’s crust and oceans, and in its pure form it is a soft silvery metal. To an untrained eye, a small piece of radium may look like a ...

Editor’s note: This article is published after the passing away of Rod Ewing. The draft manuscript was prepared by both authors. It has been lightly edited for style, length, and clarity. Additional ...

Providing recommendations on the application of the concept of clearance for materials, objects and buildings that are to be released from regulatory control, this publication supports the application ...

A New Science. The beginnings. The setting ; Rays and radiation ; Becquerel's discovery -- The Curies. Maria Skłodowska ; A consequential meeting ; New elements! -- Rutherford, Soddy, particles, and ...

Tens of thousands of sealed radioactive sources consignments are shipped around the world every year for use in industry, medicine, research, agriculture and education. This week, regulators and ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American For a long time the apparent discrepancy ...