1 : the time required for half of something to undergo a process: as a : the time required for half of the atoms of a radioactive substance to become disintegrated b : the time required for half the amount of a substance (as a drug or radioactive tracer) in or introduced into a living system or ecosystem to be eliminated or disintegrated by natural processes
2 : a period of usefulness or popularity preceding decline or obsolescence <slang usually has a short half-life>
For americium-241, it is known that half of the atoms decay in 458 years. Therefore, 458 years is the half-life of americium-241. Every radioactive element has a different half-life, ranging from fractions of a second to millions of years, depending on the specific isotope. For example, americium-243 has a half-life of 7,370 years.
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An Xbox you dumb fuck. Only accessable if your a rex. Like Mark
Wow Rex is playing the fucking Rexbox. GAYLOW!
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Excellent at online games, The fossy is a mysterious figure to be reckoned with.
<|_emon> Damn nice shot mr fossy!
<Mr.Fossy>Yes I know.... (disapears ina puff of smoke>
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A very cool guy, Who also thinks Lemons re the greatest
AAAAAA20:52 <000000Mr_Fossy> Lemons Rule
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Arselicking
Wellywanlger>> im a good user can i be su?
VIP>>wow welly your good at licking arse
VIP>>awards wellywangler su
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Its where your wanking it and then the ejaculation is about to come out and then you like pinch it and it mixes with blood and pee pee and then you let it come out and its all red and smells like a undercooked steak
Tim walked into Aarons house and it smelled like steak so Tim knows Aaron had just commited nulbery
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