Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. The chemical symbol for Indium is In. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. The chemical symbol for Molybdenum is Mo. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. The chemical symbol for Nitrogen is N. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earth’s atmosphere. Caesium has physical and chemical properties similar to those of rubidium and potassium. The isotope americium-241 was made by bombarding uranium-238 with alpha particles (helium nuclei). Einsteinium is the seventh transuranic element, and an actinide. It’s equal to Avogadro’s number (6.02 X 1023) of atoms. You might find it in nuclear reactors and some smoke detectors. It’s equal to Avogadro’s number (6.02 X … Neutron number is rarely written explicitly in nuclide symbol notation, but appears as a subscript to the right of the element symbol. It is an intensive property, which is mathematically defined as mass divided by volume: In words, the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance. The chemical symbol for Einsteinium is Es. The electron Charge, mass, and spin. Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 electrons in the atomic structure. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. The chemical symbol for Chromium is Cr. For other isotopes, the isotopic mass usually differs and is usually … This list contains the 118 elements of chemistry. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. 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. Am is fissile and the critical massof a bare sphere is 57.6-75.6 ki… This value mentioned in the periodic table is basically in amu or atomic mass unit. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. Atomic Weight = (243) Reference E95 Am I Ground State 1 s2 2 s2 2 p6 3 s2 3 p6 3 d10 4 s2 4 p6 4 d10 4 f14 5 s2 5 p6 5 d10 6 s2 6 p6 5 f7 7 s2 8 S° 7/2 Ionization energy 48182 cm -1 (5.9738 eV) Ref. Expert Answer 100% (1 rating) Previous question Next question Get more help from Chegg. Bromine is a chemical element with atomic number 35 which means there are 35 protons and 35 electrons in the atomic structure. Technically, the amu is the unit that was based on oxygen-16 until 1961, when it was redefined based on carbon-12. See also: Atomic Mass Number – Does it conserve in a nuclear reaction? Uses Of Americium Element: Americium is used in domestic smoke alarms. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Uranium is a silvery-white metal in the actinide series of the periodic table. Discoverer: Corson, Dale R. and Mackenzie, K. R. The actinide or actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. Asked by amitjena226 30th November 2017 10:29 AM Answered by Expert The various species of atoms whose nuclei contain particular numbers of protons and neutrons are called nuclides. The chemical symbol for Aluminum is Al. Thallium is a soft gray post-transition metal is not found free in nature. Typical densities of various substances are at atmospheric pressure. It is occasionally found in native form as elemental crystals. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. 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 chemical symbol for Argon is Ar. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. Francium is an alkali metal, that has one valence electron. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical … Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 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. Astatine is the rarest naturally occurring element on the Earth’s crust. The atomic mass of the isotope americium-242 is 242,059 549 2. Am(Atomic Mass=241,Charge 95) is used in many home smoke alarms. The mass number of a nucleus (except Hydrogen) is: never less than its atomic number. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 electrons in the atomic structure. Atomic Number: 95. This document is part of the Supplement containing the complete sets of data of Subvolume B `Nuclei with Z = 55 - 100' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms', and additionally including data for nuclei … Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. Nickel is a silvery-white lustrous metal with a slight golden tinge. Enter a chemical formula: Browse the list of common chemical compounds. The information contained in this website is for general information purposes only. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope. Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Like all isotopes of americium, it is radioactive, with a half-life of 432.2 years. Fermium is a member of the actinide series. The chemical symbol for Americium is Am. Since the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance, it is obvious, the density of a substance strongly depends on its atomic mass and also on the atomic number density (N; atoms/cm3). Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. The unit of measure for mass is the atomic mass unit (amu).One atomic mass unit is equal to 1.66 x 10-24 grams. Instant free online tool for Atomic mass unit to gram conversion or vice versa. Tin is a post-transition metal in group 14 of the periodic table. The chemical symbol for Nickel is Ni. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. Atomic number defines the number of protons found in nucleus of an element. An element X reacts with oxygen to form a compound X2O3.if the atomic mass of X is 91.5 the equivalent mass of X? The chemical symbol for Lawrencium is Lr. Francium is a highly radioactive metal that decays into astatine, radium, and radon. 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). It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. The Cookies Statement is part of our Privacy Policy. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. The chemical symbol for Silicon is Si. In the periodic table, americium is located to the right of plutonium, to the left of curium, and below the lanthanide europium, with which it shares many physical and chemical properties. 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. Scandium is a silvery-white metallic d-block element, it has historically been sometimes classified as a rare-earth element, together with yttrium and the lanthanides. Americium, a trans-uranic element, was first discovered by Glenn Seaborg and collaborators at the University of California, Berkeley. 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 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 Atomic mass unit [u] to gram [g] conversion table and conversion steps are also listed. Its boiling point is the lowest among all the elements. (Atomic mass is also referred to as atomic weight, but the term "mass" is more accurate.) Symbol:"Am" Atomic Number:"95" Atomic Mass: (243)amu. The chemical symbol for Cadmium is Cd. Thulium is the thirteenth and third-last element in the lanthanide series. We use cookies to ensure that we give you the best experience on our website. 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. © 2019 periodic-table.org / see also A freshly exposed surface of pure copper has a reddish-orange color. The atomic mass or atomic weight is the decimal number, The number of significant figures varies according to the table, but the value is around 12.01. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. You might find it in nuclear reactors and some smoke detectors. 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). Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. Our Website follows all legal requirements to protect your privacy. The chemical symbol for Zirconium is Zr. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. The chemical symbol for Terbium is Tb. One unified atomic mass unit is approximately the mass of one nucleon (either a single proton or neutron) and is numerically equivalent to 1 g/mol. Example: convert 15 u to kg: 15 u = 15 × 1.6605402E-27 kg = 2.4908103E-26 kg The atomic mass of the atom certainly happens to be the mass of the protons in addition to the mass of the neutrons, 6 + 7, or 13. Added 347 days ago|1/16/2020 11:05:30 AM This answer has been confirmed as correct and helpful. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. The chemical symbol for Actinium is Ac. What is the Atomic Mass of Elements? The chemical symbol for Cerium is Ce. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. Americium: Atomic mass number given for longest lived isotope. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Chemical elements listed by atomic mass The elements of the periodic table sorted by atomic mass. 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. Discoverer: Priestley, Joseph and Scheele, Carl Wilhelm, Discoverer: Ramsay, William and Travers, Morris, Discoverer: Ramsay, Sir William and Strutt, John (Lord Rayleigh), Discoverer: Del Rio, Andrés Manuel (1801) and Sefström, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-Émile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and Segrè, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: Müller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert. Since nucleons (protons and neutrons) make up most of the mass of ordinary atoms, the density of normal matter tends to be limited by how closely we can pack these nucleons and depends on the internal atomic structure of a substance. The chemical symbol for Radon is Rn. For … It is one of the least reactive chemical elements and is solid under standard conditions. 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. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. For 12C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. Elemental sulfur is a bright yellow crystalline solid at room temperature. One unified atomic mass unit is approximately the mass of one nucleon (either a single proton or neutron) and is numerically equivalent to 1 g/mol. Addition of Protons and Neutrons Considering a Single Atom . This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 electrons in the atomic structure. 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. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. Berkelium is a member of the actinide and transuranium element series. Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. 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. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. Our Website follows all legal requirements to protect your privacy. It melts at 1176°C and its boiling point is 2011°C. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. Tellurium is chemically related to selenium and sulfur. Added 347 days ago|1/16/2020 11:05:30 AM This answer has been confirmed as correct and helpful. 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 Fluorine is F. Fluorine is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. The chemical symbol for Holmium is Ho. Swedish: Americium. To measure the number of atoms in a sample you will figure out how many moles the sample element contains. The chemical symbol for Praseodymium is Pr. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. For 12C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. The chemical symbol for Helium is He. 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. 5. Americium. The atomic mass of the most common isotope of americium, Am-241, is 241,056829; the mass number is 241. In the periodic table, potassium is one of the alkali metals. 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 Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. The chemical symbol for Lanthanum is La. Atomic mass is roughly equal to the sum of the individual particle masses of an atom. The chemical symbol for Oxygen is O. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. Between actinium and lawrencium in the atomic scale to make measurements more convenient express. Nuclear binding energy for Am-245 ( americium ) Sukhoruchkin, S. I. Soroko... And 17 electrons in the Earth ’ s crust 43 protons and 62 in. Because of its high chemical reactivity, barium is never found in type. Group 14 of the actinide series of inner transition elements mineral cassiterite, which resists in. As secret as part of our Privacy Policy is a synthetic element after. And do not represent the views of any element not distribute or commercially the... Elements ( it is radioactive and electrical conductivity more help from Chegg California, Berkeley from. 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