Nat Turner led a slave revolt several years before the Civil War. The revolt failed and he was killed. he is known for leading 2 uprises in Virginia in 1831 before getting caught.
Calcium (Ca), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table. It is the most abundant metallic element in the human body and the fifth most abundant element in Earthâs crust.
The Health Benefits of Calcium. Calcium is the most abundant mineral in the human body, according to the National Institutes of Health (NIH), and the recommended intake is 1,000 mg a day for adults.Ninety-nine percent of the body's calcium is stored in bones and teeth for structural support.in. Calcium is the most abundant mineral in the human body, according to the National Institutes of Health (NIH), and the recommended intake is 1,000 mg a day for adults.