Chlorine, sulfur and carbon (as coal) are cheapest by mass. Hydrogen, nitrogen, oxygen and chlorine are cheapest by volume at atmospheric pressure. When there is no public data on the element in its pure form, price of a compound is used, per mass of element contained.
Astatine is a chemical element with the symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours.
Plutonium is a radioactive element that can be used for research and nuclear applications. It's worth about $4,000 per gram (although you can expect various regulatory agencies to take a close look at you if you start accumulating it).
Since the energy per fission from plutonium-239 and uranium-235 is about the same, the theoretical fuel value of fissile plutonium can be put at $5,600 per kilogram. Reactor-grade plutonium also contains non-fissile isotopes, reducing its value to about $4,400 per kilogram.
Francium is a rare element that occurs naturally in the earth's crust. It has a half-life of 22 minutes. Since it decays so quickly, it is hard to acquire, making it the most expensive metal on Earth.
If you were to somehow amass a gram of Francium the cost is estimated to be around $1 billion.
The least expensive elements are Carbon, Sulphur, and Chlorine which are cheap by their mass. Hydrogen, Oxygen, Nitrogen, and Chlorine are the least expensive elements by their volume in the atmospheric pressure.
One kilogram of uranium-235 can theoretically produce about 20 terajoules of energy (2×1013 joules), assuming complete fission; as much energy as 1.5 million kilograms (1,500 tonnes) of coal.
KOLKATA: In what is being claimed as a highly suspicious transaction, the detective department has nabbed five persons on Thursday evening who had come to Kolkata to sell what they claim is one kg Uranium, priced at Rs 3 crore in the open market.
While 1 kg of coal produces 8 kWh of heat, and 1 kg of oil produces 12 kWh, 1 kg of natural uranium generates 45,000 kWh.
The International Atomic Energy Agency assumes eight kilograms (kg) is enough plutonium for a first-generation nuclear bomb, but advanced weapons programs can use as little as 3.5 kg.
Plutonium, radioactive cesium and several radiation detectors were stolen from a rental car parked in this lot outside of a San Antonio hotel. More than a year later, state and federal officials don't know where the plutonium – one of the most valuable and dangerous substances on earth – is.
One gram of plutonium can produce as much energy as 100 g of uranium or 1 metric ton of oil. This plutonium is extracted from the materials contained in used fuel at the Orano La Hague site.
The 17 Rare Earths are cerium (Ce), dysprosium (Dy), erbium (Er), europium (Eu), gadolinium (Gd), holmium (Ho), lanthanum (La), lutetium (Lu), neodymium (Nd), praseodymium (Pr), promethium (Pm), samarium (Sm), scandium (Sc), terbium (Tb), thulium (Tm), ytterbium (Yb), and yttrium (Y).
The rarest stable metal is tantalum. The rarest metal on earth is actually francium, but because this unstable element has a half life of a mere 22 minutes, it has no practical use.
Oganesson is a chemical element with symbol Og and atomic number 118. Classified as a noble gas, Oganesson is a expected to be a gas at room temperature.
Nuclear weapons typically use a concentration of more than 90 percent uranium-235. 15 kilograms: weight of a solid sphere of 100 percent uranium-235 just large enough to achieve a critical mass with a beryllium reflector. Diameter of such a sphere: 4.48 in (11.4 cm).
Abstract. At the time of the accident in the reactor of the fourth power-generating unit of the Chernobyl nuclear power plant on April 26, 1986, the core contained 1659 fuel assemblies. Each assembly contained 114.7 kg of uranium, and therefore the reactor contained a total of 114.7 x 1659 = 190,287.3 kg of uranium.
Uranium metal is a malleable and ductile element stronger than gold, silver, or platinum. Additionally, uranium does not rust, corrode or tarnish.
Uranium mainly targets the kidneys: Damage starts to appear after taking in 25 milligrams, while intakes of more than 50 milligrams can cause renal failure and death [source: Argonne National Laboratory].
There are two reasons why a normal sample of uranium metal does not spontaneously explode in this way. In the first place natural uranium consists mainly of the isotope 23892U while the fissionable isotope 23592U comprises only 0.7 percent of the total.
"At" stands for astatine. It is an element with 85 protons packed into its nucleus, thus the atomic number "85" ... The problem is, there's something about 85 protons in a tight space that nature doesn't enjoy.
Ununennium, or element 119, is a predicted chemical element. Its symbol is Uue. Ununennium and Uue are substitute names made by the IUPAC, (meaning "one-one-nine-ium" in Latin) until permanent names are made. Ununennium is the element with the smallest atomic number that has not been created yet.