The half- life of radium is
A) half of the total time during which a quantity of radium will radioactively decay.
B) the time during which half of a large number of radium atoms will decay.
C) half the lifetime of the individual radium atom.
D) the life- time of the individual radium atom.
E) the time after which an individual radium atom splits in half.

Question

Quizplus · Accepted Answer

The half-life of a radioactive substance is defined as the time required for half of a large number of its atoms to decay.

The Half- Life of Radium Is