Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. Iron is a metal in the first transition series. The chemical symbol for Copper is Cu. It is occasionally found in native form as elemental crystals. The chemical symbol for Tantalum is Ta. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. The chemical symbol for Scandium is Sc. Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. Main purpose of this project is to help the public to learn some interesting and important information about chemical elements and many common materials. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 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. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. The chemical symbol for Tellurium is Te. Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 electrons in the atomic structure. The chemical symbol for Calcium is Ca. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. and Gay-Lussac, L.-J. Tellurium is chemically related to selenium and sulfur. The electronegativity of Caesium is: χ = 0.79. The information contained in this website is for general information purposes only. ChEBI. Radon is a radioactive, colorless, odorless, tasteless noble gas. The chemical symbol for Nobelium is No. Possible oxidation states are +1. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor. refer for further details: http://www.chemicalelements.com/elements/cs.html. Titanium can be used in surface condensers. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. 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. Thulium is the thirteenth and third-last element in the lanthanide series. 5s 2 .5p x 2 .5p y 2 .5pz 2 . As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. 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. 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. Uranium is a silvery-white metal in the actinide series of the periodic table. Caesium was discovered by German chemists, Robert Wilhelm Bunsen and Gustav Robert Kirchhoff, in 1860 by the newly developed method of flame spectroscopy. The chemical symbol for Aluminum is Al. 4s 2 . Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. The chemical symbol for Beryllium is Be. We can see that francium has 87 electrons. The chemical symbol for Arsenic is As. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. The chemical symbol for Ruthenium is Ru. Pure radium is silvery-white alkaline earth metal. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. Lead is a heavy metal that is denser than most common materials. Einsteinium is the seventh transuranic element, and an actinide. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. The chemical symbol for Radon is Rn. Hafnium’s large neutron capture cross-section makes it a good material for neutron absorption in control rods in nuclear power plants, but at the same time requires that it be removed from the neutron-transparent corrosion-resistant zirconium alloys used in nuclear reactors. Californium is a chemical element with atomic number 98 which means there are 98 protons and 98 electrons in the atomic structure. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. Electronegativity, symbol χ, is a chemical property that describes the tendency of an atom to attract electrons towards this atom. 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 abundance of Caesium on the earth crust is about 3 part per million and it is the 50thmost common element in the earth crust . X + e– → X– + energy        Affinity = – ∆H. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. The chemical symbol for Lanthanum is La. We have also distinguish between the possible and common oxidation states of every element. The chemical symbol for Neodymium is Nd. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. 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 Praseodymium is Pr. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. It is the least electronegativeele… Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. 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 chemical symbol for Curium is Cm. We have Provided Periodic Classification of Elements Class 10 Science MCQs Questions with Answers to help students understand the concept very well. Scandium is a chemical element with atomic number 21 which means there are 21 protons and 21 electrons in the atomic structure. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). The chemical symbol for Gold is Au. The chemical symbol for Chromium is Cr. The commercial use of beryllium requires the use of appropriate dust control equipment and industrial controls at all times because of the toxicity of inhaled beryllium-containing dusts that can cause a chronic life-threatening allergic disease in some people called berylliosis. It is a noble metal and a member of the platinum group. In nuclear reactors, promethium equilibrium exists in power operation. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. If you continue to use this site we will assume that you are happy with it. The chemical symbol for Lithium is Li. The chemical symbol for Osmium is Os. Elemental sulfur is a bright yellow crystalline solid at room temperature. Comprehensive information for the element Cesium - Cs is provided by this page including scores of properties, element names in many languages, most known nuclides and … In the periodic table, the elements are listed in order of increasing atomic number Z. Electron configuration of Caesium is [Xe] 6s1. Actinium is a soft, silvery-white radioactive metal. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. The chemical symbol for Bismuth is Bi. The chemical symbol for Erbium is Er. 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 the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. 9 years ago. Lawrencium is the final member of the actinide series. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. The chemical symbol for Rubidium is Rb. The origin of the name comes from the Latin word caesius meaning sky blue or heavenly blue.It is a very soft, light grey, ductile metal that reacts readily with oxygen and reacts explosively with water. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. Caesium has physical and chemical properties similar to those of rubidium and potassium. The chemical symbol for Astatine is At. Francium is a highly radioactive metal that decays into astatine, radium, and radon. All of its isotopes are radioactive. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Density is defined as the mass per unit volume. It must be noted, atoms lack a well-defined outer boundary. It is even less abundant than the so-called rare earths. 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 Actinium is Ac. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. 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. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. Anyone can be able to come here, learn the basics of materials science, material properties and to compare these properties. Year Discovered: 1860. Therefore, there are various non-equivalent definitions of atomic radius. Thulium is an easily workable metal with a bright silvery-gray luster. Lead is soft and malleable, and has a relatively low melting point. The name derives from the Latin caesius for "sky blue", which was the colour of the caesium line in the spectroscope. Pure germanium is a semiconductor with an appearance similar to elemental silicon. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. 2 Names and Identifiers Expand this section. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. An atom of Caesium in the gas phase, for example, gives off energy when it gains an electron to form an ion of Caesium. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. The chemical symbol for Ytterbium is Yb. 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 Cerium is Ce. is a rare earth element with a metallic silver luster. The chemical symbol for Bromine is Br. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. The chemical symbol for Silver is Ag. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). 6s1 and the term symbol is 2S1/2. [Xe] 6s2 for barium). Tin is a post-transition metal in group 14 of the periodic table. 2) You may not distribute or commercially exploit the content, especially on another website. The chemical symbol for Radium is Ra. Copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Chlorine is a yellow-green gas at room temperature. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. 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. In nuclear industry cadmium is commonly used as a thermal neutron absorber due to very high neutron absorption cross-section of 113Cd. Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars. 1 Structures Expand this section. Oxidation state 0 occurs for all elements – it is simply the element in its elemental form. Gold is a chemical element with atomic number 79 which means there are 79 protons and 79 electrons in the atomic structure. The chemical symbol for Platinum is Pt. Most of the other isotopes have half-lives from a few days to fractions of a second. Ununennium's electron affinity is expected to be far greater than that of caesium and francium; indeed, ununennium is expected to have an electron affinity higher than all the alkali metals lighter than it at about 0.662 eV, close to that of cobalt (0.662 eV) and chromium (0.676 eV). 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). Since the number of electrons and their arrangement are responsible for the chemical behavior of atoms, the atomic number identifies the various chemical elements. Nobelium is the tenth transuranic element and is the penultimate member of the actinide series. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. Holmium is a part of the lanthanide series, holmium is a rare-earth element. Titanium is a lustrous transition metal with a silver color, low density, and high strength. First Ionization Energy of Caesium is 3.8939 eV. Feel free to ask a question, leave feedback or take a look at one of our articles. 6s 1 . Sodium is a soft, silvery-white, highly reactive metal. 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. For sulfur, S, atomic number 32, the electron configuration is 1s 2 2s 2 2p 6 3s 2 3p 4. Technetium is the lightest element whose isotopes are all radioactive; none are stable. Periodic table» Cesium » Electron configuration. The chemical symbol for Mercury is Hg. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. The subshells have a distinct shape and configuration, in which the electrons move freely. 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