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Is argon considered a reactive or nonreactive element?

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Like all noble gases, its outer electron level is full and therefore is unreactive. read more

Potassium, an element vital to good health, is even more reactive than sodium. It also explodes if it's exposed to water, creating purplish flames. Potassium quickly turns black if it's exposed to air. It's crucial for the proper functioning of nerve cells in the body. Lithium doesn't explode in water, but is so light and soft that it floats. read more

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