I'm trying to understand the concept of exponential decay. To clarify, the decay of Uranium is not the same as say pulling the plug in a tub full of water. The water will drain out of a tub at a steady rate from start to finish. I assume Uranium doesn't do that. So you COULD say the water has a half life but there's no point right? But with Uranium the process is more complicated and needs to be measured by the half life. Is Uranium decay like a popcorn maker? Some kernels will pop soon after it's started and the frequency will pick up until it climax's a couple minutes in and then it will gradually stop again as the job completes? Most of the kernels will pop between say 120 seconds and 180 seconds in and the job will be finished at 220 seconds?