If an isotope has a half-life of 4 billion years, then in 4 billion years
A)all of the original amount will have decayed.
B) of the original amount will still remain.
C) of the original amount will still be present.
D)all of the original amount will still be present.
E)none of these

Question

If an isotope has a half-life of 4 billion years, then in 4 billion years
A)all of the original amount will have decayed. 
B) of the original amount will still remain. 
C) of the original amount will still be present. 
D)all of the original amount will still be present. 
E)none of these

Quizplus · Accepted Answer

The Answer of If an isotope has a half-life of 4 billion years, then in 4 billion years
A)all of the original amount will have decayed. 
B) of the original amount will still remain. 
C) of the original amount will still be present. 
D)all of the original amount will still be present. 
E)none of these

If an Isotope Has a Half-Life of 4 Billion Years