what is radiation and what is most reactive metal and non metal
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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”.
Fluorine is an univalent poisonous gaseous halogen, it is pale yellow-green and it is the most chemically reactive and electronegative of all the elements.
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Heat energy that can travel in the form of waves, like light, with the help of electromagnetic waves is called radiation.
They don't need a medium to travel
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