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Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. The chemical symbol for Silver is Ag. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. The chemical symbol for Thallium is Tl. The chemical symbol for Mendelevium is Md. It occurs on Earth as the decay product of various heavier elements. Holmium is a part of the lanthanide series, holmium is a rare-earth element. 2) You may not distribute or commercially exploit the content, especially on another website. The chemical symbol for Plutonium is Pu. The chemical symbol for Nitrogen is N. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earth’s atmosphere. Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. Berkelium is a member of the actinide and transuranium element series. The chemical symbol for Actinium is Ac. It is a noble metal and a member of the platinum group. The neutron number, N, is the number of neutrons present in the nucleus. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. The chemical symbol for Manganese is Mn. 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. Chemically, indium is similar to gallium and thallium. Oxygen was discovered by Carl Wilhelm Scheele, a Swedish pharmacist producing it from Mercuric oxide using Nitrates. 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. Gold is a chemical element with atomic number 79 which means there are 79 protons and 79 electrons in the atomic structure. Its nucleus also contains two neutrons. 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. Figure 1: Negatively charged electrons (in blue) revolving around the nucleus. 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. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. 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. Oxygen has a Boiling Point of -183°F, meaning at -183°F it will turn to a Gas. The chemical symbol for Mercury is Hg. The chemical symbol for Bromine is Br. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. The atomic number of an atom identifies which element it is. Thulium is an easily workable metal with a bright silvery-gray luster. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. Tungsten is an intrinsically brittle and hard material, making it difficult to work. Atomic number, chemical symbol, and mass number. Atomic Number is equal to the number of electrons in an uncharged atom. Neodymium is a soft silvery metal that tarnishes in air. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). In the periodic table, potassium is one of the alkali metals. Yttrium is a chemical element with atomic number 39 which means there are 39 protons and 39 electrons in the atomic structure. It is a soft, silvery-white alkali metal. The presence of Oxygen is due to the process of photosynthesis from plants. Discoverer: Davy, Sir H. and Thénard, L.-J. no. The number of protons in the nucleus of an atom determines an element's atomic number. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. The chemical properties of the atom are determined by the number of protons, in fact, by number and arrangement of electrons. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. Mass number (A) is the sum of the atomic number(Z), which is the number of protons, and neutrons (N) in the nucleus of a specific isotope of an element (A=Z+N). Its extreme rarity in the Earth’s crust, comparable to that of platinum. The chemical symbol for Chlorine is Cl. Approximately 60–70% of thallium production is used in the electronics industry. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. The chemical symbol for Titanium is Ti. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 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. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. The nucleus is composed of protons and neutrons. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. If you continue to use this site we will assume that you are happy with it. Major advantage of lead shield is in its compactness due to its higher density. Melting point of Oxygen is -218,4 °C and its the boiling point is -182,9 °C. Chlorine is a yellow-green gas at room temperature. Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. The chemical symbol for Neodymium is Nd. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. The name xenon for this gas comes from the Greek word ξένον [xenon], neuter singular form of ξένος [xenos], meaning ‘foreign(er)’, ‘strange(r)’, or ‘guest’. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jöns Jacob/Klaproth, Martin Heinrich. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. The chemical symbol for Curium is Cm. Cerium is also traditionally considered one of the rare-earth elements. Nickel is a silvery-white lustrous metal with a slight golden tinge. Atomic Number: 8. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. The chemical symbol for Polonium is Po. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. Arsenic is a metalloid. Melting Point: -218.4 °C (54.750008 K, -361.12 °F) Boiling Point: -183.0 °C (90.15 K, -297.4 °F) Number of Protons/Electrons: 8. The metal is found in the Earth’s crust in the pure, free elemental form (“native silver”), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. Here, Atomic number = Number of protons = Number of electrons = 13 Neptunium metal is silvery and tarnishes when exposed to air. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). In commercial uses Oxygen is used in hospitals and by divers and has industrial uses such as welding and oxidation of metals. 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. Krypton is a member of group 18 (noble gases) elements. 1amu = 1.66 x 10-24 grams. The chemical symbol for Scandium is Sc. The chemical symbol for Bismuth is Bi. 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. Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. Abbreviation: at. Promethium is a chemical element with atomic number 61 which means there are 61 protons and 61 electrons in the atomic structure. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 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. The bulk properties of astatine are not known with any certainty. Non-metals are the substances that do not exhibit such characteristic of metals as hardness, mechanical adaptability or the ability to conduct electricity. The chemical symbol for Ruthenium is Ru. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. Atomic number definition, the number of positive charges or protons in the nucleus of an atom of a given element, and therefore also the number of electrons normally surrounding the nucleus. The chemical symbol for Praseodymium is Pr. 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. Lead is widely used as a gamma shield. The chemical symbol for Cerium is Ce. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. A freshly exposed surface of pure copper has a reddish-orange color. 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 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. Its properties are thus intermediate between those of chlorine and iodine. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. Low atomic number materials are more efficient at scattering X-rays than higher atomic materials. The chemical symbol for Aluminum is Al. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. The elements of the periodic table are listed in order of increasing atomic number.. Atomic number is not the same as: Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. It has the atomic number 8 in … Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. The chemical symbol for Californium is Cf. The chemical symbol for Astatine is At. The chemical symbol for Nobelium is No. Elemental sulfur is a bright yellow crystalline solid at room temperature. Significant concentrations of boron occur on the Earth in compounds known as the borate minerals. These number of protons are unique for a given element, and the number is called the atomic number or proton number. Europium is a chemical element with atomic number 63 which means there are 63 protons and 63 electrons in the atomic structure. Iron is a metal in the first transition series. In fact their absorption cross-sections are the highest among all stable isotopes. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Oxygen's Electronegativty is 3.44. The chemical symbol for Molybdenum is Mo. Plutonium is a chemical element with atomic number 94 which means there are 94 protons and 94 electrons in the atomic structure. Oxygen has a Melting Point of -218.4°F, meaning at -218.4°F it will turn to a liquid. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. 113Cd has specific absorption cross-section. Isotopes are named for their mass numbers. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. Periodic Table of Elements - The periodic table is a very useful listing of all 118 elements by symbol, atomic number, and atomic mass and molecular mass. The chemical symbol for Nickel is Ni. is a rare earth element with a metallic silver luster. Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. Its average atomic mass is 12.11. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. The atomic number originally was used to signify the element's location in the periodic table. and Gay-Lussac, L.-J. Atomic Number – Protons, Electrons and Neutrons in Oxygen. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. Obtained primarily from liquid air by fractional distillation. Europium is one of the least abundant elements in the universe. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. Atomic weight of Oxygen is 15.999 u or g/mol. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. The chemical symbol for Indium is In. The chemical symbol for Silicon is Si. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. 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. The chemical symbol for Iridium is Ir. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. The chemical symbol for Zirconium is Zr. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. The chemical symbol for Lithium is Li. Atomic Number of Oxygen. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Atomic Number – Does it conserve in a nuclear reaction? Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. Since \(2 + 2 = 4\), we know that the mass number of the helium atom is 4. Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. The atomic number of a sodium atom is 11 and its mass number is 23. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Positively charged protons (in pink) and neutral neutrons (in black) present at the centre. The chemical symbol for Platinum is Pt. The chemical symbol for Chromium is Cr. Sodium is a soft, silvery-white, highly reactive metal. The chemical symbol for Samarium is Sm. Nickel belongs to the transition metals and is hard and ductile. 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 Lanthanum is La. The atomic number uniquely identifies a chemical element. The chemical symbol for Helium is He. Zirconium is widely used as a cladding for nuclear reactor fuels. The Cookies Statement is part of our Privacy Policy. Therefore the atomic mass of hydrogen is 1.00784 amu. It is identical to the charge number … Actinium is a soft, silvery-white radioactive metal. It is the electrons that are responsible for the chemical bavavior of atoms, and which identify the various chemical elements. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. 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. 1) You may use almost everything for non-commercial and educational use. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. 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