Background Radiation / Isotopes

Background Radiation

Radiation is all around us. It comes from radioactive substances including the ground, air, building materials and food. Radiation is also found in cosmic rays from space.

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Isotopes

All the atoms of a given element have the same number of protons. The number of neutrons can vary. Atoms of the same element that have different numbers of neutrons are called isotopes of that element.

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