Why some metals are more reactive and others are less reactive
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Because they lose electrons to form positive ions. Such metals which can lose electrons easily to form positive ions when reacted with other substances, are reactive metals.
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a metal loses electrons less rapidly to form positive ions, it will react slowly with other substances. Such a metal will be less reactive. For example, sodium atom is a very reactive metal because it readily loses one electron, forms a positive ion which then combines with other substances. On the other hand, lead atom loses electrons with difficulty to form positive ions, so lead metal is less reactive
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