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The chemical symbol for Silicon is Si. The name xenon for this gas comes from the Greek word ξένον [xenon], neuter singular form of ξένος [xenos], meaning ‘foreign(er)’, ‘strange(r)’, or ‘guest’. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. Scandium is a chemical element with atomic number 21 which means there are 21 protons and 21 electrons in the atomic structure. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. The chemical symbol for Zirconium is Zr. Plutonium is a radiological poison and must be handled with care. One atomic mass unit is equal to 1.66 x 10-24 grams. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). Only about 5×10−8% of all matter in the universe is europium. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. The various nuclear applications of plutonium are well known. For example, 63Cu (29 protons and 34 neutrons) has a mass number of 63 and an isotopic mass in its nuclear ground state is 62.91367 u. Our Website follows all legal requirements to protect your privacy. 2) You may not distribute or commercially exploit the content, especially on another website. All of its isotopes are radioactive. The chemical symbol for Chlorine is Cl. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. Polonium is a rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. The chemical symbol for Molybdenum is Mo. We use cookies to ensure that we give you the best experience on our website. The chemical symbol for Thallium is Tl. It has a low melting point (640 °C) and an unusually high boiling point (3,228 °C). Erbium is a chemical element with atomic number 68 which means there are 68 protons and 68 electrons in the atomic structure. Density is defined as the mass per unit volume. The chemical symbol for Ruthenium is Ru. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Atomic mass of Plutonium is 244 u. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Cerium is the second element in the lanthanide series. The melting point of Plutonium has been found as 640 o C. But it has an unusually high boiling point, which is about 3228 o C.There are three major synthetic isotopes of Plutonium. (40 to 50 kg) Simple implosion weapon: 33 lbs (15 kg) Sophisticated Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. This, the most common structural form of the element (allotrope), is about as hard and brittle as gray cast iron unless it is alloyed with other metals to make it soft and ductile. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. The various species of atoms whose nuclei contain particular numbers of protons and neutrons are called nuclides. There are two reasons for the difference between mass number and isotopic mass, known as the mass defect: Typical densities of various substances at atmospheric pressure. Other articles where Plutonium-239 is discussed: atomic bomb: The properties and effects of atomic bombs: of the isotopes uranium-235 or plutonium-239, it causes that nucleus to split into two fragments, each of which is a nucleus with about half the protons and neutrons of the original nucleus. The chemical symbol for Praseodymium is Pr. The chemical symbol for Astatine is At. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. Because of its high chemical reactivity, barium is never found in nature as a free element. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. The material will generate about 0.57 watts/gram of 238Pu. Main purpose of this project is to help the public learn some interesting and important information about the peaceful uses of nuclear energy. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. It is fairly soft and slowly tarnishes in air. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) stabilizes the free metal somewhat against further oxidation. The chemical symbol for Scandium is Sc. The chemical symbol for Copper is Cu. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. Discoverer: Davy, Sir H. and Thénard, L.-J. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. 1) You may use almost everything for non-commercial and educational use. Check the chart for more details. Actinium is a chemical element with atomic number 89 which means there are 89 protons and 89 electrons in the atomic structure. Atomic mass of Plutonium is 244 u. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. The chemical symbol for Iridium is Ir. © 2019 periodic-table.org / see also Lawrencium is the final member of the actinide series. Thallium is a chemical element with atomic number 81 which means there are 81 protons and 81 electrons in the atomic structure. Each nuclide is denoted by chemical symbol of the element (this specifies Z) with tha atomic mass number as supescript. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature. The chemical symbol for Germanium is Ge. The chemical symbol for Terbium is Tb. Plutonium-238 was the first isotope to be made. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. By far of greatest importance is the isotope 239 Pu, which has a half-life of more than 20000 years. The chemical symbol for Lanthanum is La. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Weights of atoms and isotopes are from NIST article. They are 238 Pu, 239 Pu, and 240 Pu. Gold is a transition metal and a group 11 element. The chemical symbol for Francium is Fr. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. It is even less abundant than the so-called rare earths. al. The chemical symbol for Nickel is Ni. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. Plutonium, like most metals, has a bright silvery appearance at first, much like nickel, but it oxidizes very quickly to a dull gray, although yellow and olive green are also reported. Holmium is a relatively soft and malleable silvery-white metal. Nickel belongs to the transition metals and is hard and ductile.  The density of Hassium results from its high atomic weight and from the significant decrease in ionic radii of the elements in the lanthanide series, known as lanthanide and actinide contraction. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. Titanium is a lustrous transition metal with a silver color, low density, and high strength. Nuclides that have the same neutron number but a different proton number are called isotones. Atomic mass of Plutonium is 244 u. 1) You may use almost everything for non-commercial and educational use. The density of plutonium-238 at room temperature is about 19.8 g/cc. In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. The bulk properties of astatine are not known with any certainty. Significant concentrations of boron occur on the Earth in compounds known as the borate minerals. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. The Cookies Statement is part of our Privacy Policy. In the process of splitting, a great amount of thermal energy, as well as gamma rays and two… Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. The chemical symbol for Thorium is Th. The first atomic bomb used in war had a uranium core and was dropped on Hiroshima, Japan on August 6, 1945. A freshly exposed surface of pure copper has a reddish-orange color. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. Elemental sulfur is a bright yellow crystalline solid at room temperature. Although classified as a rare earth element, samarium is the 40th most abundant element in the Earth’s crust and is more common than such metals as tin. Tin is a post-transition metal in group 14 of the periodic table. Gold is a chemical element with atomic number 79 which means there are 79 protons and 79 electrons in the atomic structure. 15117-48-3. The second atomic bomb used had a plutonium core and was nicknamed "Fat Man" because of its round shape. The chemical symbol for Plutonium is Pu. The chemical symbol for Europium is Eu. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. The unit of measure for mass is the atomic mass unit (amu). Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. Unlike most metals, it is not a good conductor of heat or electricity. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. The chemical symbol for Plutonium is Pu. Plutonium is a man-made trans-uranic element. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. www.nuclear-power.net. Atomic weight: [ 244 ] Standard state: solid at 298 K Discoverer: McMillan, Edwin M. and Abelson, Philip H. Discoverer: Glenn T. Seaborg, Joseph W. Kennedy, Edward M. McMillan, Arthur C. Wohl, Discoverer: Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso, Discoverer: Glenn T. Seaborg, Ralph A. James, Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Kenneth Street, Jr., Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Bernard G. Harvey, Gregory R. Choppin, Albert Ghiorso, Discoverer: Albert Ghiorso, Glenn T. Seaborg, Torbørn Sikkeland, John R. Walton, Discoverer: Albert Ghiorso, Torbjørn Sikkeland, Almon E. Larsh, Robert M. Latimer, Copyright 2020 Periodic Table | All Rights Reserved |. The chemical symbol for Mercury is Hg. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 electrons in the atomic structure. Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. Plutonium ek chemical element hae, jiske chemical symbol Pu, atomic number 94 aur aomic mass 244 hae . The chemical symbol for Strontium is Sr. Strontium is an alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly reactive chemically. One atomic mass unit is equal to 1.66 x 10-24 grams. Actinium is a soft, silvery-white radioactive metal. Pure radium is silvery-white alkaline earth metal. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. Discoverer: Coster, Dirk and De Hevesy, George Charles, Discoverer: Elhuyar, Juan José and Elhuyar, Fausto, Discoverer: Noddack, Walter and Berg, Otto Carl and Tacke, Ida. These condensers use tubes that are usually made of stainless steel, copper alloys, or titanium depending on several selection criteria (such as thermal conductivity or corrosion resistance). Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 electrons in the atomic structure. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. Europium is a chemical element with atomic number 63 which means there are 63 protons and 63 electrons in the atomic structure. Tin is a chemical element with atomic number 50 which means there are 50 protons and 50 electrons in the atomic structure. The chemical symbol for Antimony is Sb. Therefore, we cannot determine the neutron number of uranium, for example. Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. In nuclear reactors, promethium equilibrium exists in power operation. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. Mass was no longer considered unchangeable in the closed system. Plutonium's atomic mass is 244,064 204 (5) because the only naturally occurring isotope is 244Pu. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell that it readily donates, creating a positively charged atom—the Na+ cation. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure.  It is a synthetic element (first synthesised at Hasse in Germany) and radioactive. Tellurium is chemically related to selenium and sulfur. Our Website follows all legal requirements to protect your privacy. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. The chemical symbol for Krypton is Kr. Tellurium is far more common in the universe as a whole than on Earth. This website does not use any proprietary data. Omitting local effects, the global mean ratios of 240

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