Reply #102: So's iodine!! So is strontium! You're measuring this in atomic units.

[caseymoz]

Physically impossible? You forget the "heavy" weight you're talking about is weighed in protons and neutrons, not micrograms. They can still be far lighter than say, pollen, which is carried aloft over oceans. If you have dust particles small enough, they can certainly be taken aloft and carried. Iodine has a little more than half the weight of plutonium, which means that a plutonium dust particle made of just half the atoms of an iodine particle will travel just as well.

So, not as many of them will travel so far so fast, but, yes, they will travel. And plutonium is just twice the weight but is far nastier than iodine in the long run.