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.
148,942 Contributions. Calcium   Calcium is the main component of your bones and teeth. It comprises 1.5% of your total body weight making it the most abundant metallic element in the human bodâ¦y. Calcium is classified as an alkaline-earth metal Calcium (Ca++) is soft and naturally silver/grey/white in color Atomic number is 20 atomic mass 40.08.