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.
Normal Calcium Levels in Blood. Calcium is the most abundant mineral in the body. For an average adult there are about 15 g of calcium for every 1 kg of body weight. This adds up to approximately 1 kg of total calcium for an average size adult. Ninety-nine percent of this calcium is stored in the bone.