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. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. The chemical symbol for Europium is Eu. Francium is an alkali metal, that has one valence electron. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. Lawrencium is the final member of the actinide series. Bromine is a chemical element with atomic number 35 which means there are 35 protons and 35 electrons in the atomic structure. [118][119], Outside and inside view of an americium-based smoke detector. The chemical symbol for Americium is Am . Americium is a Block F, Group 3, Period 7 element. A neutral atom has the same number of protons and electrons (charges cancel each other out). ): Karlsruhe. 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 bulk properties of astatine are not known with any certainty. The chemical symbol for Tantalum is Ta. The chemical symbol for Polonium is Po. Zirconium is widely used as a cladding for nuclear reactor fuels. Americium: Symbol:"Am" Atomic Number:"95" Atomic Mass: (243)amu. The chemical symbol for Fluorine is F. Fluorine is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. You can find the number of neutrons if you know the isotope of the atom. Europium is one of the least abundant elements in the universe. In the bones, americium is first deposited over cortical and trabecular surfaces and slowly redistributes over the bone with time. Get an answer to your question “Element Name Symbol Mass Number Atomic Number Number of Protons Number of Neutrons Number of Electrons Lithium Carbon Chlorine Silver Lead ...” in 📙 Chemistry if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. The americium was produced by bombarding plutonium with neutrons in a nuclear reactor. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. This element is radioactive and can be safely used in small amounts. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. This problem is pertinent to uranium or plutonium rods, in which only surface layers provide alpha-particles. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. Under standard conditions, it is the lightest metal and the lightest solid element. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. Einsteinium is the seventh transuranic element, and an actinide. Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 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. In nuclear industry cadmium is commonly used as a thermal neutron absorber due to very high neutron absorption cross-section of 113Cd. Melting Point: 994.0 °C (1267.15 K, 1821.2 °F) Boiling Point: 2607.0 °C (2880.15 K, 4724.6 °F) Number of Protons/Electrons: 95. Because there is no net charge, we know that # protons = # electrons, so there are 89 electrons as well. Americium has 95 protons and electrons. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. It decays into neptunium-239 through alpha decay. The chemical symbol for Platinum is Pt. For example, the element has been employed to gauge glass thickness to help create flat glass. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. The number of electrons in each of Americium's shells is 2, 8, 18, 32, 25, 8, 2 and its electron configuration is [Rn] 5f 7 7s 2.The americium atom has a radius of 173.pm and its Van der Waals radius is 244.pm. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. Atomic weight of Americium is 243 u or g/mol. The chemical symbol for Rhodium is Rh. The chemical symbol for Radon is Rn. The chemical symbol for Niobium is Nb. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. As a highly radioactive element, americium and its compounds must be handled only in an appropriate laboratory under special arrangements. Neptunium metal is silvery and tarnishes when exposed to air. Here americium acts as the alpha source, and beryllium produces neutrons owing to its large cross-section for the (α,n) nuclear reaction: The most widespread use of 241AmBe neutron sources is a neutron probe – a device used to measure the quantity of water present in soil, as well as moisture/density for quality control in highway construction. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. Actinium is a chemical element with atomic number 89 which means there are 89 protons and 89 electrons in the atomic structure. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. Thallium is a soft gray post-transition metal is not found free in nature. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. The chemical symbol for Silicon is Si. Number of electrons present in the valence shell of an atom or number of protons present in the nucleus of an atom is known as atomic number of an element. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. It is the electrons that are responsible for the chemical bavavior of atoms, and which identify the various chemical elements. The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. The chemical symbol for Thallium is Tl. Unknown in nature, americium (as the isotope americium-241) was artificially produced from plutonium-239 (atomic number 94) in 1944 by American chemists Glenn T. Seaborg, Ralph A. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. When freshly prepared, it has a silvery-white metallic lustre, but then slowly tarnishes in air. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. The chemical symbol for Bromine is Br. Thorium is moderately hard, malleable, and has a high melting point. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. Radon occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead. Yttrium is a chemical element with atomic number 39 which means there are 39 protons and 39 electrons in the atomic structure. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. The chemical symbol for Magnesium is Mg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. The chemical symbol for Mendelevium is Md. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. The chemical symbol for Terbium is Tb. The chemical symbol for Zinc is Zn. Thus group number indicates number of electrons present in the valence shell. Lead is widely used as a gamma shield. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Both 242Cm and 242Pu transform via nearly the same decay chain through 238Pu down to 234U. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Thulium is an easily workable metal with a bright silvery-gray luster. The chemical symbol for Scandium is Sc. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. Pure germanium is a semiconductor with an appearance similar to elemental silicon. In a neutral atom there are as many electrons as protons moving about nucleus. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. The atomic number of actinium is 89, which means there are 89 protons. The chemical symbol for Arsenic is As. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. Name: Americium. Americium is one of the elements in the actinide series of inner transition elements. the Americium is radiate element in the Actinium series 5f in the periodic table its atomic number is 95 so. The chemical symbol for Helium is He. The chemical symbol for Sodium is Na. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Californium is a chemical element with atomic number 98 which means there are 98 protons and 98 electrons in the atomic structure. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. Classification: Rare Earth. It is used in smoke detectors and can be used as a portable source of gamma rays. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. Building and Fire Research Laboratory, National Institute of Standards and Technology; UL Smoke and Fire Dynamics Seminar. The chemical symbol for Americium is Am . Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. Compared to the alternative optical smoke detector, the ionization smoke detector is cheaper and can detect particles which are too small to produce significant light scattering; however, it is more prone to false alarms. 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). Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 electrons in the atomic structure. … Holmium is a part of the lanthanide series, holmium is a rare-earth element. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. The chemical symbol for Germanium is Ge. 2. The nucleus is composed of protons and neutrons. Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. [97][98][99][100], As 241Am has a roughly similar half-life to 238Pu (432.2 years vs. 87 years), it has been proposed as an active element of radioisotope thermoelectric generators, for example in spacecraft. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Californium is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium). 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. It may also be classified as a rare earth element. Americium (Am), synthetic chemical element (atomic number 95) of the actinoid series of the periodic table. Aluminium is placed in 3rd A group of the periodic table. The chemical symbol for Barium is Ba. The chemical symbol for Manganese is Mn. Dysprosium is used for its high thermal neutron absorption cross-section in making control rods in nuclear reactors, for its high magnetic susceptibility in data storage applications. The information contained in this website is for general information purposes only. Berkelium is a member of the actinide and transuranium element series. We use cookies to ensure that we give you the best experience on our website. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring … Nickel is a silvery-white lustrous metal with a slight golden tinge. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. An ion has an unequal number of protons and electrons. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. 1) You may use almost everything for non-commercial and educational use. In 1994, 17-year-old David Hahn extracted the americium from about 100 smoke detectors in an attempt to build a breeder nuclear reactor. The latter subsequently decays to 238Pu and then to 234U.[13]. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. In nuclear reactors, promethium equilibrium exists in power operation. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Chemically, indium is similar to gallium and thallium. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins. The chemical symbol for Mercury is Hg. It relies on the very high rate of nuclear fission of 242mAm, which can be maintained even in a micrometer-thick foil. The chemical symbol for Francium is Fr. Americium has an atomic number of 95 (the number of protons in the nucleus of the americium atom). The chemical symbol for Californium is Cf. Americium: Symbol: Am: Atomic Number: 95: Atomic Mass: 243.0 atomic mass units Number of Protons: 95: Number of Neutrons: 148: Number of Electrons: 95: Melting Point: 994.2° C: Boiling Point: 2607.0° C: Density: 13.6 grams per cubic centimeter: Normal Phase: Synthetic: Family: Rare Earth Metals: Period: 7: Cost: $160 per milligram (The isotope americium-243 also decays by α emission and is longer-lived at 7370 years, but it is obtained by irradiating americium-241 with neutrons so it is more expensive.) Thulium is the thirteenth and third-last element in the lanthanide series. The chemical symbol for Nickel is Ni. and Gay-Lussac, L.-J. Americium (Am) is a chemical element having 95 protons, same as how many Americium-241 has. In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. The chemical symbol for Erbium is Er. They can also transfer their energy to a fluid and generate electricity through a magnetohydrodynamic generator. The number of electrons in an electrically-neutral atom is the same as the number of protons in the nucleus. In the periodic table, potassium is one of the alkali metals. Electrons per Energy Level: 2,8,18,32,25,8,2 Shell Model; Ionic Radius: 0.982Å; Filling Orbital: 5f 7; Number of Electrons (with no charge): 95; Number of Neutrons (most common/stable nuclide): 148; Number of Protons: 95; Oxidation States: 6,5,4,3; Valence Electrons: 5f 7 7s 2. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Americium was the fourth synthetic transuranium element of the actinide series to be discovered. [86] Several studies have been reported on the biosorption and bioaccumulation of americium by bacteria[87][88] and fungi. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. There are two long-lived alpha-emitters; 243Am has a half-life of 7,370 years and is the most stable isotope, and 241Am has a half-life of 432.2 years. The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. The amount of americium in a typical new smoke detector is 1 microcurie (37 kBq) or 0.29 microgram. Francium is a highly radioactive metal that decays into astatine, radium, and radon. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. 2) You may not distribute or commercially exploit the content, especially on another website. Tellurium is chemically related to selenium and sulfur. Carbon is the 15th most abundant element in the Earth’s crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. Fermium is a member of the actinide series. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. It is the fourth most common element in the Earth’s crust. The half-lives of other isotopes and isomers range from 0.64 microseconds for 245m1Am to 50.8 hours for 240Am. The isotope of americium used in smoke detectors is americium-241, which decays by α emission to neptunium-237 with a half-life of 432.2 years. McCluskey died at the age of 75 of unrelated pre-existing disease. Its extreme rarity in the Earth’s crust, comparable to that of platinum. Atomic mass of Americium is 243 u. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. Electrons, so there are 63 protons and 95 electrons and the noble gases the disposal of smoke detectors the! Ninth member of the periodic table x 10-19 coulombs isotopes.The first isotope to be discovered condenser! Building up of the atom consist of a set of seventeen chemical with! Of 141 years similar chemical properties are thus intermediate between those of most other lanthanides and... 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