Why does calcium start floating when water is added to.water
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calcium is one of the hardest metal found in nature and it is insoluble in water so when it is mixed with water instead of reacting with water it floats
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the reaction of calcium with water is less violent , so the heat released is not sufficient for the hydrogen to catch fire . calcium starts floating because the bubbles of hydrogen gas which are from during the reaction stick to the surface of the metal and hence calcium floats on water
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