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The behaviour of electrons determines much of what forms our physical world.
- Electrons moving from one orbit to another either absorb or emit radiation such as visible light, ultraviolet rays, infrared light and x-rays.
- Electrons moving from one energy state to another within an orbit also do so by the absorption or release of energy
- Rapidly moving "free" electrons release x-rays if slowed suddenly
- Atoms sharing or stealing orbital electrons with other atoms form chemical bonds that make compounds like salt, water and form complex molecules like DNA.
- The movement of free electrons forms electrical current.
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