Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Platinum is one of the least reactive metals. Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. 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 Osmium is Os. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 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. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 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. Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. Name: Fluorine Symbol: F Atomic Number: 9 Atomic Mass: 18.998404 amu Melting Point:-219.62 °C (53.530006 K, -363.31598 °F) Boiling Point:-188.14 °C (85.01 K, -306.652 °F) Number of Protons/Electrons: 9 Number of Neutrons: 10 Classification: Halogen Crystal Structure: Cubic Density @ 293 K: 1.696 g/cm 3 Color: Greenish Atomic Structure Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. The chemical symbol for Arsenic is As. 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. The chemical symbol for Helium is He. Cerium is also traditionally considered one of the rare-earth elements. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Radon is a radioactive, colorless, odorless, tasteless noble gas. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. Actinium is a soft, silvery-white radioactive metal. 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. Fluorine is a naturally occurring compound that was first identified by Scheele. Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. 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 Arsenic is As. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 electrons in the atomic structure. It has an estimated density of 40.7 x 103 kg/m3. 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. 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. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. The chemical symbol for Phosphorus is P. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but because it is highly reactive, phosphorus is never found as a free element on Earth. The chemical symbol for Uranium is U. is a rare earth element with a metallic silver luster. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. 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. In a neutral atom there are as many electrons as protons moving about nucleus. The chemical symbol for Nickel is Ni. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. 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. Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. The chemical symbol for Polonium is Po. Tungsten is an intrinsically brittle and hard material, making it difficult to work. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Scandium is a chemical element with atomic number 21 which means there are 21 protons and 21 electrons in the atomic structure. Fluorine is the strongest oxidising agent. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. 1)an atom has a mass number of 27 and 14 neutrons. 1) You may use almost everything for non-commercial and educational use. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. Elemental sulfur is a bright yellow crystalline solid at room temperature. The name samarium is after the mineral samarskite from which it was isolated. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. 2) You may not distribute or commercially exploit the content, especially on another website. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. The chemical symbol for Manganese is Mn. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. The chemical symbol for Radium is Ra. The chemical symbol for Samarium is Sm. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. The chemical symbol for Barium is Ba. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. The chemical symbol for Samarium is Sm. The configuration of these electrons follows from the principles of quantum mechanics. The chemical symbol for Bromine is Br. 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. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. 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. Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. It has nine protons. The Cookies Statement is part of our Privacy Policy. What can you conclude about an atom of fluorine from this fact? Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. The chemical symbol for Lithium is Li. The chemical symbol for Lanthanum is La. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. 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. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 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. 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). Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Gold is a transition metal and a group 11 element. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. However, there are trace amounts in nature of the radioactive isotope fluorine-23, which occurs via cluster decay of protactinium-231. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. Lead is soft and malleable, and has a relatively low melting point. The chemical symbol for Berkelium is Bk. The chemical symbol for Praseodymium is Pr. Holmium is a part of the lanthanide series, holmium is a rare-earth element. Fluorine is the chemical element in the periodic table that has the symbol F and atomic number 9. 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. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Silver is a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Plutonium is a chemical element with atomic number 94 which means there are 94 protons and 94 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 Americium is Am. 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. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. A total of eighteen isotopes of fluorine have been discovered, with atomic masses ranging from 14 to 31. Pure germanium is a semiconductor with an appearance similar to elemental silicon. Gravity. power decreases from fluorine to iodine. 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 soft, silvery-white, highly reactive metal. One atomic mass unit is equal to 1.66 x 10-24 grams. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. The chemical symbol for Rhodium is Rh. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. The chemical symbol for Selenium is Se. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. Actinium is a soft, silvery-white radioactive metal. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. Lead is widely used as a gamma shield. A freshly exposed surface of pure copper has a reddish-orange color. The difference is a measure of the nuclear binding energy which holds the nucleus together. Discoverer: Davy, Sir H. and Thénard, L.-J. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Nuclides that have the same neutron number but a different proton number are called isotones. The chemical symbol for Holmium is Ho. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. 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 Radon is Rn. © 2019 periodic-table.org / see also Fluorine is a light yellow diatomic gas. The chemical symbol for Francium is Fr. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. Only about 5×10−8% of all matter in the universe is europium. Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. 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. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. 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 Rubidium is Rb. From the Latin and French fluere: flow or flux. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. Normally, fluorine is a gas with a pale yellow color that is made up of diatomic molecules, F2. Chlorine is a yellow-green gas at room temperature. 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). Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. In fact their absorption cross-sections are the highest among all stable isotopes. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. Areas covered include atomic structure, physical properties, atomic interaction, thermodynamics, identification, atomic size, crystal structure, history, abundances, and nomenclature. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. It is one of the least reactive chemical elements and is solid under standard conditions. In writing the electron configuration for fluorine the first two electrons will go in the 1s orbital. 2) You may not distribute or commercially exploit the content, especially on another website. The unit of measure for mass is the atomic mass unit (amu). What is the mass # of a fluorine … The chemical symbol for Cerium is Ce. 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 Nobelium is No. 1) You may use almost everything for non-commercial and educational use. It is a soft, silvery-white alkali metal. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. Cerium is the second element in the lanthanide series. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. The chemical symbol for Lutetium is Lu. Francium is a highly radioactive metal that decays into astatine, radium, and radon. Its properties are thus intermediate between those of chlorine and iodine. The chemical symbol for Palladium is Pd. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. 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. 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 Beryllium is Be. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. 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. It is a noble metal and a member of the platinum group. This means there are 9 protons in the nucleus. Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. 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