Question

what is radiation?

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Answer 1

Radiation is energy that comes from a source and travels through space at the speed of light. This energy has an electric field and a magnetic field associated with it, and has wave-like properties. You could also call radiation “electromagnetic waves”.

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Answer 2

Sodium (and to some extent potassium) form peroxides, X2O2, containing the more complicated O2−2 ion. Potassium, rubidium and cesium form superoxides, XO2. containing the superoxide ion, O−2.

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