4 ms·

Less than a second for all known isotopes I can find [0] So by the time you get to the post office it's under the weight limit (and you and everyone nearby are

• Y_Y 2y ago
  What's wrong with 278Mt? That should give you a lesiurely 4.5 seconds.
  • rtkwe 2y ago
    The problem is I missed it wasn't ms like the rest of them. Still stands though you'll lose too much density by the time it's weighed even assuming you could mass create the Mt all at once.
    • Y_Y 2y ago
      Not with that attitude. If you've got a particularly slothful postal worker you might consider topping up your meitnerium with a similarly sized sample of roentgenium-282. If you don't have any to hand then perhaps you'll have better luck producing tennessine-294 and waiting a couple of minutes. Amusingly your trip from Tennessee to x-ray land will take you via Moscow and Japan. (Beware that you might end up making the box bulge a bit, since you'll necessarily go over the size limit by including less dense materials as well as necessary apparatus.)