But this “huge” space is occupied primarily by electrons, because the nucleus occupies only about 1721×10−45 m3 of space. Tellurium is far more common in the universe as a whole than on Earth. 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. The chemical symbol for Palladium is Pd. PION. The chemical symbol for Fermium is Fm. Chlorine is a yellow-green gas at room temperature. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. The chemical symbol for Osmium is Os. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Hydrogen (H) is a tasteless, colorless, odorless gas and has the atomic number 1. The most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds. Indeed, atomic hydrogen is the most crucial component in the gas-phase mixture, which drives the whole chemical process and performs a number of important functions [33], such as: • Atomic H can etch sp 2 carbon many times faster than sp 3 carbon; • With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Nitrogen (atomic number = 7) Hydrogen (atomic number = 1) 15. 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 Einsteinium is Es. The chemical symbol for Dysprosium is Dy. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. Typical densities of various substances are at atmospheric pressure. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 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). Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 electrons in the atomic structure. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. The chemical symbol for Oxygen is O. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. Hydrogen is also used in various industrial fields such as metalworking and as a coolant in generators in power stations. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. and Gay-Lussac, L.-J. Tin is a post-transition metal in group 14 of the periodic table. In nuclear industry cadmium is commonly used as a thermal neutron absorber due to very high neutron absorption cross-section of 113Cd. The chemical symbol for Francium is Fr. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. Therefore, the effective nuclear charge towards the outermost electrons increases, drawing the outermost electrons closer. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. 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. We are given the atomic mass of hydrogen equal to 1 g/mol. The chemical symbol for Arsenic is As. Lawrencium is the final member of the actinide series. Thulium is an easily workable metal with a bright silvery-gray luster. Carbon is one of the few elements known since antiquity. 17. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. 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. The chemical symbol for Tellurium is Te. Sulfur is a chemical element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. Europium is one of the least abundant elements in the universe. Uranium has the highest atomic weight of the primordially occurring elements. Non-remnant stars are mainly composed of hydrogen in the plasma state. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 electrons in the atomic structure. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. 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 atomic radii decrease across the periodic table because as the atomic number increases, the number of protons increases across the period, but the extra electrons are only added to the same quantum shell. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. Since hydrogen is a part of water molecule, it is an absolutely essential chemical element for life, which can be found in all living bodies on our planet. See more. A freshly exposed surface of pure copper has a reddish-orange color. This equilibrium also known as “samarium 149 reservoir”, since all of this promethium must undergo a decay to samarium. 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. Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. The chemical symbol for Thorium is Th. Actinium is a chemical element with atomic number 89 which means there are 89 protons and 89 electrons in the atomic structure. ERNEST. Like atomic hydrogen, the assemblage can exist in a number of energy levels. 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. The chemical symbol for Praseodymium is Pr. Hydrogen is the chemical element with the symbol H and atomic number 1. As a result, the electron cloud contracts and the atomic radius decreases. 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. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Since the atomic mass is equal to the sum of the neutrons and the protons. It consists of two protons and two electrons held together by electrostatic forces. Elemental sulfur is a bright yellow crystalline solid at room temperature. In nuclear industry gadolinium is commonly used as a neutron absorber due to very high neutron absorbtion cross-section of two isotopes 155Gd and 157Gd. The electron configuration of hydrogen is given … Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. The chemical symbol for Silver is Ag. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. The name of the gas is formed from two Greek words, meaning water and forming, so this is the element which creates water. Platinum is one of the least reactive metals. Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. Due to the quantum nature of electrons, the electrons are not point particles, they are smeared out over the whole atom. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. The chemical symbol for Aluminum is Al. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 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. Arsenic is a metalloid. It is fairly soft and slowly tarnishes in air. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. The chemical symbol for Terbium is Tb. If you need other answers you … The chemical symbol for Actinium is Ac. 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. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. Nickel belongs to the transition metals and is hard and ductile. Subatomic particle with a mass close to zero. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. Basic Atomic Number 1 Facts Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure. Unstable subatomic particle. The chemical symbol for Chlorine is Cl. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. The other significant use of this chemical element is in fossil fuel processing. Answer: 2 on a question Atomic number of hydrogen - the answers to smartanswers-in.com Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. Einsteinium is the seventh transuranic element, and an actinide. 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. The wavefunction with n = 1, \(l\) \(l\) = 0 is called the 1s orbital, and an electron that is described by this function is said to be “in” the ls … 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. (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. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. Nobelium is the tenth transuranic element and is the penultimate member of the actinide series. 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