What is the reason radioactive decay is measured in half-life’s instead of just using the elements “full-life”?

Question

Is there something special about the halfway point? Does the decay happen at a steady pace or exponentially?

In: 910

Answer 1

Half life is logarithmic, not linear.

Half of 1000 = 500.
Half of 500 = 250.
Half of 250 = 125.

You can see the issue here. You’ll never reach zero.