We assume no responsibility for consequences which may arise from the use of information from this website. Because of its high chemical reactivity, barium is never found in nature as a free element. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. The chemical symbol for Nickel is Ni. is a rare earth element with a metallic silver luster. The chemical symbol for Praseodymium is Pr. Naturally … Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. 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. Atomic Mass Number – Does it conserve in a nuclear reaction? This variation is typically small for solids and liquids but much greater for gases. Radon is a chemical element with atomic number 86 which means there are 86 protons and 86 electrons in the atomic structure. 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.  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. The unit of measure for mass is the atomic mass unit (amu). Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. The chemical symbol for Arsenic is As. The chemical symbol for Holmium is Ho. The chemical symbol for Iron is Fe. Tellurium: Symbol: Te: Atomic Number: 52: Atomic Mass: 127.6 atomic mass units: Number of Protons: 52: Number of Neutrons: 76: Number of Electrons: 52: Melting Point: 449.5° C: Boiling Point: 989.8° C: Density: 6.24 grams per cubic centimeter: Normal Phase: … On the periodic table of the elements, atomic radius tends to increase when moving down columns, but decrease when moving across rows (left to right). Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. Isotope abundances of tellurium. Atomic Mass Number – Does it conserve in a nuclear reaction? As a result of this expansion, the density of most materials decreases. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. Radon occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead. Thulium is an easily workable metal with a bright silvery-gray luster. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. In the periodic table, the elements are listed in order of increasing atomic number Z. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. Titanium can be used in surface condensers. Sulfur is a chemical element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. The chemical symbol for Einsteinium is Es. Hassium is a chemical element with symbol Hs and atomic number 108. The information contained in this website is for general information purposes only. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Tellurium Facts. The chemical symbol for Nitrogen is N. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earth’s atmosphere. If you continue to use this site we will assume that you are happy with it. Tellurium is not very common in the earth crust. Tellurium is far more common in the universe as a whole than on Earth. It is a synthetic element (first synthesised at Hasse in Germany) and radioactive. Its boiling point is the lowest among all the elements. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. The atomic radius of a chemical element is a measure of the distance out to which the electron cloud extends from the nucleus. The chemical symbol for Copper is Cu. Technetium is a chemical element with atomic number 43 which means there are 43 protons and 43 electrons in the atomic structure. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. From periodic table, Atomic number of tellurium (Te) is 52. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. ... (Atomic Number 54 and Element Symbol Xe) Cadmium Facts. Isotopes: Tellurium has 33 isotopes whose half-lives are known, with mass numbers 106 to 138. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. It is occasionally found in native form as elemental crystals. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. The chemical symbol for Europium is Eu. 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 effect is caused by a decrease in the atomic number density. Lead is widely used as a gamma shield. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. The atomic radius of Tellurium atom is 138pm (covalent radius). 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. Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. The chemical symbol for Radium is Ra. Thorium is moderately hard, malleable, and has a high melting point. 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. Francium is a highly radioactive metal that decays into astatine, radium, and radon. 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. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. Gold is a transition metal and a group 11 element. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. 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. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Iron is a metal in the first transition series. It is the electrons that are responsible for the chemical bavavior of atoms, and which identify the various chemical elements. Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. Atomic Number – Does it conserve in a nuclear reaction? As a result, the electron cloud contracts and the atomic radius decreases. Tellurium is a chemical element with the symbol Te and atomic number 52. Its extreme rarity in the Earth’s crust, comparable to that of platinum. It is fairly soft and slowly tarnishes in air. The chemical symbol for Aluminum is Al. Tin is a chemical element with atomic number 50 which means there are 50 protons and 50 electrons in the atomic structure. Elemental sulfur is a bright yellow crystalline solid at room temperature. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Atomic number. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Discoverer: Ramsey, Sir William and Cleve, Per Teodor. The chemical symbol for Tantalum is Ta. Nickel is a silvery-white lustrous metal with a slight golden tinge. Platinum is one of the least reactive metals. Neptunium metal is silvery and tarnishes when exposed to air. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. Atomic mass. The chemical symbol for Lutetium is Lu. The unit of measure for mass is the atomic mass unit (amu). 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