Structurally, the element radium can be considered a close if crazed cousin of the element calcium. Both are alkaline earth metals, silvery white in color. Both are built in cubic crystalline structures. As a result, when a person swallows radium, the body channels it in a way similar to calcium—some is metabolized away, some goes toward nerve and muscle function, and most is deposited into the bones. But where calcium strengthens the mineral content of the skeleton, radium does the opposite.
