Half-life ( t ½ )
(hydrogen-3) 3 H 1 years strontium-90 90 Sr 38 28 years carbon-14 14 C 6 5,700 years radium-226 226 Ra 88 1,600 years plutonium-239 239 Pu 94 24,000 years uranium-238 238 U 92 4,500,000,000 years
WARNING: This calculator cannot be used as a substitute for legal advice. The calculator assumes that you die in 2012 and make no significant lifetime gifts. If you are married, the calculator assumes that you and your spouse each own half of every asset. The calculator makes other important (and potentially wrong) assumptions about your estate. The calculator computes federal estate tax, without regard to the federal deduction for state death taxes. The tax due in any given case may be substantially higher or lower than is shown above, and may vary depending on your state of residence.
It’s not terribly difficult to see how this situation came to be, though seeing how to get out of it has proved a bit trickier. Despite the rise of chat apps such as Slack, analyses by market researchers, such as the Radicati Group, have shown that people are sending and receiving more work emails than ever. And in addition to the sheer volume, the Adobe survey highlights another complicating factor: People increasingly expect their correspondents to answer emails within hours, if not minutes — putting pressure on everyone to constantly monitor their inboxes.