The excess neutrons act somewhat like nuclear glue. Log in. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. Thallium is a chemical element with atomic number 81 which means there are 81 protons and 81 electrons in the atomic structure. Chlorine has two isotopes, 35 Cl and 37 Cl, in the approximate ratio of 3 atoms of 35 Cl to 1 atom of 37 Cl. The chemical symbol for Oxygen is O. It has two isotopes of atomic mass 35 and 37. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. The chemical symbol for Iodine is I. Iodine is the heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at standard conditions that sublimes readily to form a violet gas. 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. Answer to: A chlorine atom has 17 protons, 18 neutrons, and 17 electrons. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. There are two stable isotopes, 35 Cl (75.77%) and 37 Cl (24.23%), giving chlorine a standard atomic weight of 35.45. Mass was no longer considered unchangeable in the closed system. The chemical symbol for Tantalum is Ta. What is the average atomic mass of a sample of chlorine? Under standard conditions, it is the lightest metal and the lightest solid element. Chlorine has an atomic mass of 35,453 u. 10. Neutron number is rarely written explicitly in nuclide symbol notation, but appears as a subscript to the right of the element symbol. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. Chlorine (17 Cl) has 25 isotopes with mass numbers ranging from 28 Cl to 52 Cl and 2 isomers (34m Cl and 38m Cl). The chemical symbol for Lutetium is Lu. It is occasionally found in native form as elemental crystals. According to the Einstein relationship (E=mc2), this binding energy is proportional to this mass difference and it is known as the mass defect. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. Erbium is a chemical element with atomic number 68 which means there are 68 protons and 68 electrons in the atomic structure. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. D. 25. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity on the Pauling scale, behind only oxygen and fluorine. We assume no responsibility for consequences which may arise from the use of information from this website. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. 6. The chemical symbol for Lithium is Li. The chemical symbol for Ytterbium is Yb. Correct answer - What is the atomic mass of chlorine? Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). 4 sig figs = 35.45. Chlorine is made up of 75.78% ^35Cl and 24.22% ^37Cl. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. The chemical symbol for Barium is Ba. 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. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Zirconium is widely used as a cladding for nuclear reactor fuels. As a result, as the number of protons increases, an increasing ratio of neutrons to protons is needed to form a stable nucleus. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. For other isotopes, the isotopic mass usually differs and is usually within 0.1 u of the mass number. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. 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 2021 Periodic Table | All Rights Reserved |. The atomic mass is carried by the atomic nucleus, which occupies only about 10-12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. The chemical symbol for Caesium is Cs. The chemical symbol for Mendelevium is Md. The chemical symbol for Neon is Ne. What is the difference between the two types of chlorine atom? Our Website follows all legal requirements to protect your privacy. 2) You may not distribute or commercially exploit the content, especially on another website. | EduRev Class 9 Question is disucussed on EduRev Study Group by 100 Class 9 Students. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. Lead is widely used as a gamma shield. 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 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. Tin is a chemical element with atomic number 50 which means there are 50 protons and 50 electrons in the atomic structure. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. A sample of nitrogen is made up of 99.6% of nitrogen-14 atoms and 0.36% of nitrogen- It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. The chemical symbol for Osmium is Os. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 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. B. There are only certain combinations of neutrons and protons, which forms stable nuclei. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. Holmium is a part of the lanthanide series, holmium is a rare-earth element. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. Lead is soft and malleable, and has a relatively low melting point. Iridium is a very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium). The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. In the case of chlorine, chlorine-35 has a mass of around 35 u, and chlorine-37 around 37 u. The chemical symbol for Promethium is Pm. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. The chemical symbol for Manganese is Mn. The chemical symbol for Niobium is Nb. 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. 1. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. Atomic mass of chlorine is 35.5. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. 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. Astatine is the rarest naturally occurring element on the Earth’s crust. Lanthanum is a chemical element with atomic number 57 which means there are 57 protons and 57 electrons in the atomic structure. The chemical symbol for Neptunium is Np. The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. Neutron number plus atomic number equals atomic mass number: N+Z=A. It is one of the least reactive chemical elements and is solid under standard conditions. The chemical symbol for Bismuth is Bi. (X*34.969)+((1-x)36.966)=35.453 How he got that answer and how can I solve it step by step please The chemical symbol for Silver is Ag. For 12C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. A. The chemical symbol for Chromium is Cr. Caesium has physical and chemical properties similar to those of rubidium and potassium. We assume no responsibility for consequences which may arise from the use of information from this website. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. Step 1: List the known and unknown quantities and plan the problem. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. www.nuclear-power.net. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. The molar mass of one chlorine atom is 35.45g/mol, as can be found in the Periodic Table of Elements. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). See also: Atomic Mass Number – Does it conserve in a nuclear reaction? Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Main purpose of this project is to help the public learn some interesting and important information about the peaceful uses of nuclear energy. Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure. 113Cd has specific absorption cross-section. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. Achild throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. The chemical symbol for Curium is Cm. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. 3 sig figs = 35.5. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Blue-Gray, lustrous, silver-gray metal 54 protons and 69 electrons in the atomic structure a hard... Exposed to air, slightly reddish yellow, dense, soft, alkaline... 50 which means there are 73 protons and 69 electrons in the atomic structure occurs Earth! Number 79 which means there are 90 protons and 32 electrons in the structure! Brittle metal with a silvery white metal, hafnium chemically resembles zirconium and the. 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