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Calcium is dull gray, but it is shiny when scratched. Other physical properties. Calcium is an excellent conductor of electricity. It is very soft and easily scratched. Chemical properties. Calcium reacts rapidly with air to form a coating of gray oxide, and it burns with a red flame.
Your muscles use calcium to contract and move. Photo Credit Brand X Pictures/Brand X Pictures/Getty Images. Calcium is so important to muscular function that if blood calcium runs low, your body will take the calcium from your bones for use.Of all the minerals, your body contains the most calcium, states the National Institutes of Health Office of Dietary Supplements.our muscles use calcium to contract and move. Photo Credit Brand X Pictures/Brand X Pictures/Getty Images. Calcium is so important to muscular function that if blood calcium runs low, your body will take the calcium from your bones for use.