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It might help you think of in terms of tossing coins or rolling dice. Say you toss a bunch of coins every minute and get rid of all the ones that turn up tails. The coin collection would have a half life of a minute. The point is that the coins (atoms) don't know anything about how many others there are or how long they've been waiting around to decay for.

It might help you think of it in terms of tossing coins or rolling dice. Say you toss a bunch of coins every minute and get rid of all the ones that turn up tails. The coin collection would have a half-life of a minute. The point is that the coins (atoms) don't know anything about how many others there are or how long they've been waiting around to decay.

It might help you think of in terms of tossing coins or rolling dice. Say you toss a bunch of coins every minute and get rid of all the ones that turn up tails. The coin collection would have a half life of a minute. The point is that the coins (atoms) don't know anything about how many others there are or how long they've been decaying for.

It might help you think of in terms of tossing coins or rolling dice. Say you toss a bunch of coins every minute and get rid of all the ones that turn up tails. The coin collection would have a half life of a minute. The point is that the coins (atoms) don't know anything about how many others there are or how long they've been waiting around to decay for.

It might help you think of in terms of tossing coins or rolling dice. Say you toss a bunch of coins every minute and get rid of all the ones that turn up tails. The coin collection would have a half life of a minute. The point is that the coins (atoms) don't know anything about how many other there are or how long they've been decaying for.

It might help you think of in terms of tossing coins or rolling dice. Say you toss a bunch of coins every minute and get rid of all the ones that turn up tails. The coin collection would have a half life of a minute. The point is that the coins (atoms) don't know anything about how many others there are or how long they've been decaying for.