Since nucleons (protons and neutrons) make up most of the mass of ordinary atoms, the density of normal matter tends to be limited by how closely we can pack these nucleons and depends on the internal atomic structure of a substance. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 electrons in the atomic structure. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. Today, liquid hydrogen is used as a primary fuel of the American space program by The National Aeronautics and Space Administration (NASA). Boiling point of Hydrogen in Kelvin is 20.28 K. Hydrogen melting point is -259,1 °C. The chemical symbol for Francium is Fr. The chemical symbol for Ruthenium is Ru. It is used as a fuel by the space shuttle main engine and was … Neodymium is a soft silvery metal that tarnishes in air. 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. The chemical symbol for Manganese is Mn. The number of atoms or molecules (n) in a mass (m) of a pure material having atomic or molecular weight (M) is easily computed from the following equation using Avogadro's number (NA = 6.022×10 23 atoms or molecules per gram-mole): M mN n A (1) In some situations, the atomic number density (N), which is the concentration of atoms or molecules per Uranium has the highest atomic weight of the primordially occurring elements. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. Due to the quantum nature of electrons, the electrons are not point particles, they are smeared out over the whole atom. A hydrogen atom is an atom of the chemical element hydrogen.The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force. State of Hydrogen is Gas at standard temperature and pressure Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. 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. Cerium is the second element in the lanthanide series. The chemical symbol for Cerium is Ce. Hydrogen is also used in various industrial fields such as metalworking and as a coolant in generators in power stations. Being constructed of 1 proton and 1 electron it has no neutrons. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. It is believed to be the first atom produced in our Universe after the Big Bang, and all other elements were further produced from hydrogen as a result of nuclear fusion. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. 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. Silver is a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The chemical symbol for Titanium is Ti. Consequently, the smallest atom is helium with a radius of 32 pm, while one of the largest is caesium at 225 pm. Its boiling point is the lowest among all the elements. The chemical symbol for Erbium is Er. Given: Hydrogen has an atomic mass near 1 gram/mole. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. Only about 5×10−8% of all matter in the universe is europium. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. The most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. (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. Discoverer: Davy, Sir H. and Thénard, L.-J. One more very important point is: hydrogen is now seen as a source of clean eco-friendly fuel of the future, which will help the humanity to solve the problem of pollution and being gas/oil dependent. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). The chemical symbol for Polonium is Po. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. The chemical symbol for Thorium is Th. 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's atomic number is 1 because all hydrogen atoms contain exactly one proton. The atomic radius of a chemical element is a measure of the distance out to which the electron cloud extends from the nucleus. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. ERNEST. The electron configuration of hydrogen is given … Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. The chemical symbol for Chromium is Cr. 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. These electrons together weigh only a fraction (let say 0.05%) of entire atom. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. Thorium is moderately hard, malleable, and has a high melting point. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. Atomic weight of Hydrogen is 1.008 u or g/mol. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. As a result, the electron cloud contracts and the atomic radius decreases. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. Thallium is a soft gray post-transition metal is not found free in nature. By mass, aluminium makes up about 8% of the Earth’s crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below. Zirconium is widely used as a cladding for nuclear reactor fuels. Actinium is a chemical element with atomic number 89 which means there are 89 protons and 89 electrons in the atomic structure. Like atomic hydrogen, the assemblage can exist in a number of energy levels. The atomic mass of hydrogen is 1.00794 amu (atomic mass units). Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. The chemical symbol for Argon is Ar. The volume of an atom is about 15 orders of magnitude larger than the volume of a nucleus. The chemical symbol for Silver is Ag. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. The chemical symbol for Niobium is Nb. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. It is the heaviest essential mineral nutrient. 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). The chemical symbol for Hydrogen is H. Atomic Mass of Hydrogen Atomic mass of Hydrogen is 1.0079 u. Assuming spherical shape, the uranium atom have volume of about  26.9 ×10−30 m3. Thulium is the thirteenth and third-last element in the lanthanide series. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 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. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. The chemical symbol for Barium is Ba. is a rare earth element with a metallic silver luster. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. Nitrogen (atomic number = 7) Hydrogen (atomic number = 1) 15. It is a noble gas, non-metal and is the most abundant element in the universe. We most recently saw this clue in 'The New York Times Mini' on Thursday, 15 October 2020 with the answer being ONE, we also found ONE to be the most popular answer for this clue. Atomic orbitals can be the hydrogen-like "orbitals" which are exact solutions to the Schrödinger equation for a hydrogen-like "atom" (i.e., an atom with one electron). Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. The chemical symbol for Bismuth is Bi. ONE. The classical description cannot be used to describe things on the atomic scale. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. 17. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 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. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. PION. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. 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. The chemical symbol for Lanthanum is La. 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. Since hydrogen is a part of water molecule, it is an … The chemical symbol for Zinc is Zn. The chemical symbol for Scandium is Sc. Nickel is a silvery-white lustrous metal with a slight golden tinge. If we include man made elements, the densest so far is Hassium. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons in its nucleus. 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. The chemical symbol for Fermium is Fm. The chemical symbol for Promethium is Pm. al. The chemical symbol for Americium is Am. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. Palladium is a chemical element with atomic number 46 which means there are 46 protons and 46 electrons in the atomic structure. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. The chemical symbol for Germanium is Ge. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 electrons in the atomic structure. Melting Point: -259.14 °C (14.009985 K, -434.45203 °F) Boiling Point: -252.87 °C (20.280005 K, -423.166 °F) Number of Protons/Electrons: 1. Astatine is the rarest naturally occurring element on the Earth’s crust. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Unstable subatomic particle. It is an intensive property, which is mathematically defined as mass divided by volume: In words, the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance. The chemical symbol for Cadmium is Cd. 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. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. The chemical symbol for Beryllium is Be. We use cookies to ensure that we give you the best experience on our website. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. 2) You may not distribute or commercially exploit the content, especially on another website. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. Hydrogen: Symbol: H: Atomic Number: 1: Atomic Mass: 1.00794 atomic mass units: Number of Protons: 1: Number of Neutrons: 0: Number of Electrons: 1: Melting Point-259.14° C: Boiling Point-252.87° C: Density.08988 grams per cubic centimeter: Normal Phase: Gas: Family: Nonmetal: Period: 1: … The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. A freshly exposed surface of pure copper has a reddish-orange color. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. Einsteinium is the seventh transuranic element, and an actinide. The chemical symbol for Mendelevium is Md. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. Basic Atomic Number 1 Facts Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. “Atomic number of hydrogen” We are sharing answer for NYT Mini Crossword of October 15 2020 for clue that we published below. Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. Its extreme rarity in the Earth’s crust, comparable to that of platinum. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. The chemical symbol for Lawrencium is Lr. Although neodymium is classed as a rare earth, it is a fairly common element. 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). The chemical symbol for Rubidium is Rb. 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. Holmium is a relatively soft and malleable silvery-white metal. The chemical symbol for Lithium is Li. Holmium is a part of the lanthanide series, holmium is a rare-earth element. Symbol: H. Atomic Number: 1. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. Ortho-hydrogen and para-hydrogen. Non-remnant stars are mainly composed of hydrogen in the plasma state. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. 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. Nickel belongs to the transition metals and is hard and ductile. In nuclear reactors, promethium equilibrium exists in power operation. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. Uranium is a silvery-white metal in the actinide series of the periodic table. and Gay-Lussac, L.-J. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 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. 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. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. The chemical symbol for Radium is Ra. Europium is one of the least abundant elements in the universe. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. The chemical symbol for Iron is Fe. Lead is a heavy metal that is denser than most common materials. On the atomic scale, physicists have found that quantum mechanics describes things very well on that scale. 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