how to know the uranium metal?
451632
Uranium is a chemical element in the periodic table that has the symbol U and atomic number 92. Heavy, silvery-white, toxic, metallic, naturally radioactive, pyrophoric, and teratogenic, uranium belongs to the actinide series and its isotope 235U is used as the fuel for nuclear reactors and the explosive material for nuclear weapons. Depleted uranium is used in incendiary projectile weapons. Uranium is commonly found in very small amounts in rocks, soil, water, plants, and animals (including humans).
61553
well, the place to start is the periodic table.  uranium's configuration number is [Rn] 5f3 6d1 7s2, which means the outermost electrons are in the n = 7 shell.\nto calculate the radius of 7s electrons requires some seriously ugly quantum mechanics, so i'll just present you with some results:\nhttp://web.mit.edu/3.091/www/pt/pert1.html\nwhich states that the atomic radius is 1.38 angstroms.  other places on the web list 1.45 angstroms and 1.7 angstroms, so about 1.5 seems like a pretty good average.  (an angstrom is 10^-10 m, or 0.1 nanometer)\n\nas for the nuclear radius, this has to be measured from proton-scattering experiments.  typically they are around 1 femtometer, which is 10^-15m or 0.00001 of an angstrom.  (see the wikipedia page for more detail)\n\ncheers!
326489
It depends on which isotope you are atlking about.  The number of the isotope gives you the total number of nucleons (protons and neutrons) that it has.  Potasium is element number 19, so it has 19 protons (it is electrically neutral so it has just as many electrons as protons).  To find the number of neutrons just subtract 19 from the total number of nucleons.\n\nPotassium-39 has 20 neutrons, 19 protons and 19 electrons\nPotassium-40 has 21 neutrons, 19 protons and 19 electrons\nPotassium-41 has 22 neutrons, 19 protons and 19 electrons
697931
Check the Periodic Chart and find element 74.  That's the symbol to use, and its ion will be +6
1012358
Osmium is densest followed by Irridium\nOs\nOsmium is the densest element known and the hardest of all platinum\ngroup metals (PGMs). It is 10 times harder than platinum itself.\nOsmium also has a higher melting point than the other PGMs.\nP r o p e r t i e s\nElectrical conductivity 0.109 106 cm-1 Ohm-1\nDensity 22.61 g/cc\nHardness (Brinell value) 3920 MN m-2\nMelting point 3050 ºC\nRarity 1x10-4 ppm in lithosphere\nAtomic number 76\nAtomic weight 190.23\nElectrical resistivity 8.12 microhm.cm at 0°C\nThermal conductivity 87 watts/metre/°C\n\nHeaviest element I think is Francium\nFrancium is a chemical element in the periodic table that has the symbol Fr and atomic number 87. This is a highly radioactive alkali metal that is found in uranium and thorium ores. \nThis element, which was named for France, was discovered in 1939 by Marguerite Perey of the Curie Institute in Paris. Francium is the heaviest alkali metal and occurs as a result of actinium's alpha decay and can be artificially made by bombarding thorium with protons. \n\nEven though it naturally occurs in uranium minerals, it has been estimated that there might be less than 30 grams of francium in the crust of the earth at any one time. It is the most unstable element among the first 101 and has the highest equivalent weight of any element. \n\nThere are 41 known isotopes of francium. With a 22 minute half life, the longest lived isotope of this element is 223Fr which is a daughter isotope of 227At and is the only isotope of francium that occurs naturally. All known isotopes of francium are highly unstable, therefore knowledge of the properties of this element only comes from radiochemical procedures. \n\nA small number of pictures of francium have been taken but only of at the most 200,000 atoms at a time. The pictures were taken by trapping the atoms and using a special fluorescent imaging camera.
433299
well, do you have access to a stone saw?  Look for crystalline structure inside of the object.  Also determine it's specific gravity, and you can look it up on the jpl web site.  First though is it metal, magnetic? Or a rock.
182621
Uranium is a naturally occurring element found at low levels in virtually all rock, soil, and water. It is considered to be more plentiful than antimony, beryllium, cadmium, gold, mercury, silver, or tungsten and is about as abundant as arsenic or molybdenum. It is found in many minerals including uraninite (most common uranium ore), autunite, uranophane, torbernite, and coffinite. Significant concentrations of uranium occur in some substances such as phosphate rock deposits, and minerals such as lignite, and monazite sands in uranium-rich ores (it is recovered commercially from these sources).\n\nThe decay of uranium, thorium and potassium-40 in the Earth's mantle is thought to be the main source of heat[5][6] that keeps the outer core liquid and drives mantle convection, which in turn drives plate tectonics.\n\nYou can find deposits of uranium by using a Geiger counter or by looking for other kinds of rock that uranium is found near.\n\nPlutonium, on the other hand, is not naturally occuring.  You can make plutonium by "enriching" uranium in special reactors.
387120
You're close.  To find out how much uranium oxide is formed you have to determine how many moles of each starting material you have available and which is the limiting reagent.\n\nU + O2-> UO2\n\nMoles U = grams U/molecular weight = 100g/238.03g/mol\n=0.42moles uranium\n\nMoles O2 = grams O2/molecular weight = 37.2g/32g/mol\n=0.156moles O2\n\nFrom the chemical equation; 1 mole U + 1 mole O2 yeilds 1 mole UO2.  So from the above calculations we can see that the amount of O2 is limiting.  Thus the number of moles of UO2 formed must be equivalent to the #moles O2 (because it's limiting).  You can then calculate the grams of UO2:\n\ng UO2= moles UO2 formed * molecular weight UO2\ng UO2 = 0.156moles * 270.03g/mol\ng UO2 = 42.12g\n\n\nTo fully oxidize 100g of uranium, the number of moles of oxygen gas would have to be equivalent to the # of moles uranium.\n\nFrom the calculations above, we know that 100g U= 0.42 moles\n\nSo the # moles O2 required for complete oxidation is 0.42 moles.  Therefore the number of grams O2 can be calculated by using the molecular weight of O2:\n\ngrams O2= #moles O2* molecular weight O2\ngrams O2= 0.42* 32g/mol= 13.44grams O2 required
758041
brass is an alloy of copper and zinc, unless we have its composition, we cant tell its specific heat.
714340
look up the periodic table...duh
831461
Are you trying to tie in depleted uranium?
1142591
Just get a blood test and send the sample to the very few labs that measure that kind of metals.
223643
because not all of it has turned into lead yet. a half life extends forever. the part that has not decayed is still uranium.
375662
Take timer and thermometer.\n\nHeat the first metal, and check temperature every 5 seconds or so and write the temperature in a table.\n\nDo it with all the metals you want to check and compare the results.\n\nit should take about an hour depending on how many differnt metals you want to check, and it dont cost much.
882220
pretty sure its a metal.\nhope this helps. :)
496427
Not sure of the question but... uranium ore is mostly composed of the isotope U-238 which does not support self-sustaining fission reaction very well.  Enrichment is the process of extracting and purifying U-235 which is much more potent for use in weapons.\n\nWell, rockeytj - it's a physics question.  It's not like anyone's going to do it tonight with a blender and some toothpicks.  It takes zillions dollars worth of equipment, not to mention tons and tons of uranium ore.
645706
uranium has been stolen  a while ago... there must be other precious elements or   just to steal oil. What else it can be....\n\n\n i d i o t s!!!