what is the temperature of a decaying radioisotope like plutonium?
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Plutonium 238 is the isotope used to fuel spacecraft.  It has a half life of about 88 years meaning that if you have 1 gram of it now, in 88 years you will have 1/2 gram of it.  The heat is used to power a thermocouple and that makes electricity.\n\nThess links are pretty good reading:\n\nhttp://www.epa.gov/radiation/radionuclides/plutonium.htm\n\nhttp://www.lanl.gov/source/orgs/nmt/nmtdo/AQarchive/05spring/heart.html\n\nhttp://www.uic.com.au/nip18.htm\n\nRemember, heat and temperature are too different things.  The environment where the stuff is kept would determine the temperature.  How much of it you have would determine the amount of heat it outputs.  I would surmise that over a period of 88 years, the heat output would be 1/2 of what it originally was.
921632
PV = NRT, solve for N, note that T is absolute temperature in kelvins
601803
not much\nsomething else decays into radium, or is recombinant
977303
maybe what your teacher is trying to say here is the body temperature. now search for that answer. it's your homework.
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no jeremy you must be thinking of other radioactive elements. plutonium is safe enough to handle without any safety apparatus, though the thought of doing that sounds stupid.\n\nPu238 and 239 are alpha emitters , ie their radiation does not penetrate skin. a solid ball of plutonium poses no risk unless a brick is dropped onto it, in which case there is a surge of radiation emitted, and a very high risk of acute radiation poisoning. of course such a careless act will cause trouble with any kind of radioactive metal, not just Pu.\n\notherwise it would require you to inhale powdered plutonium to even give you an elevated risk of injury. thats right, since alpha particles cant penetrate your skin, you have to put plutonium in your gut to have it do damage to you.
73795
Nothing.  Temperature is actually the kinetic energy of   countless atoms in a given space.  At 0 kelvin the atoms would stop moving.
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Uranus surface temp is probably 99.6 degrees.  It's normally a little warmer than an under the tongue reading.
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in theory, when the temp reaches absolute zero everything freezes and is -459.67 degrees F.  temps within a few billionths of a degree have been reached but the materials used in the experiment took on nontraditional states.  at the temp all molecular motion would cease so it would be impossible to reach the temp exactly.
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Very roughly:  by comparing the ratio between a radioisotope and its "daughter product", and with the knowledge of the radioisotope's half-life, calculate the amount of time needed for the observed ratio to develop.\n\nIn short, if there is a 50-50 split between the radioisotope and its daughter product, one half-life has passed.
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No. Absolute Zero is 459 degrees below zero Fahrenheit. \n\nTemperature is dependent on the rate of oscillation in molecules. At Absolute Zero the oscillations are as low as they can get.
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176\n\nuse this site\n\nhttp://people.uncw.edu/dixonrd/tempconv.htm
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It's absolute zero, where there is no heat, and therefore no movement of particles.  It is -273 C.
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Theoretically, it will just keep halving for all of time, but this is just statistics. When there's too few atoms of the radioactive element, for statistics to apply, the half-life is no longer valid.\nFor practical uses, it is assumed that the element is roughly gone after 10 half-lives, so after 10-12 hours the effect should be negligible
868161
Polonium 210 is a radioactive metalloid isotope. The atomic mass of Polonium is 209, so Po 210 would be an isotope of the "standard" elemental polonium. The answer to your question would be it is an element, but it is an isotope of that element. All an isotope means is that it is the same element as before, just with a few more or less neutrons that the atomic number of that atom. This does not make it a different element, just a different isotype of it. For example, Hydrogen has isotopes with no neutrons, 1 neutron, and 2 neutrons. One of these isotopes of Hydrogen is radioactive. It is still the element of Hydrogen, because only the number of protons determine which element it is.
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NH3  -33.34 °C\nCH3F -78°C\nCH4 −161.6 °C\nHe -268.93 °C
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Yes:\nIce - 0 F\nLead-621 F\nIron- 2800 F\nNickel- 2647 F\nRadium - 1292 F
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By cryogenic liquid, I'm assuming you mean something very cold, like liquid nitrogen, liquid oxygen, liquid helium, or liquid hydrogen.  And fissionable material is uranium or plutonium, so you're asking what happens when you make uranium cold?  \n\nRadiation is a nuclear process, not one that has to do with chemical reactions that are subject to fluctuations in temperature.  Whether the atoms are banging around with a lot of energy due to high temperature or very little due to low temperature, the nucleus's will continue to fission unperturbed.