Name: Nitrogen Symbol: N Atomic Number: 7 Atomic Mass: 14.00674 amu Melting Point:-209.9 °C (63.250008 K, -345.81998 °F) Boiling Point:-195.8 °C (77.35 K, -320.44 °F) Number of Protons/Electrons: 7 Number of Neutrons: 7 Classification: Non-metal Crystal Structure: Hexagonal Density @ 293 K: 1.2506 g/cm 3 Color: colorless Atomic Structure The chemical symbol for Chlorine is Cl. Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. The chemical symbol for Rhenium is Re. A nitrogen atom has 7 protons, and the most commonisotope of nitrogen has 7 neutrons. If you have more homework to do you can use the search bar to find the answer to other homework: 150 have done it today and 86 in the last hour. 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. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number … 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. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772. Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 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. 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. The chemical symbol for Hafnium is Hf. Oxygen 15 and nitrogen 15 are the same elements because they have the same atomic mass. It is occasionally found in native form as elemental crystals. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. The chemical symbol for Barium is Ba. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. Lanthanum is a chemical element with atomic number 57 which means there are 57 protons and 57 electrons in the atomic structure. At 0.099%, phosphorus is the most abundant pnictogen in the Earth’s crust. The atomic number communicates how many protons an element possesses. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. Caesium has physical and chemical properties similar to those of rubidium and potassium. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. 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. 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 Selenium is Se. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. For example, atomic number of nitrogen is 7 and in a ion there will be 7 + 3 = 10 electrons and there will be 7 protons. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Explanation:Atomic number represents the total number of protons present in an atom. The chemical symbol for Fermium is Fm. The chemical symbol for Americium is Am. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. The chemical symbol for Thallium is Tl. 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. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. The chemical symbol for Helium is He. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. The chemical symbol for Titanium is Ti. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. It occurs on Earth as the decay product of various heavier elements. For each isotope, give the following information: (a) the number of protons; (b) the number of neutrons; how can you determine the number of protons, electrons,neutrons, atomic number, and the atomic mass of an element using the periodic table? All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. The chemical symbol for Rubidium is Rb. Fermium is a member of the actinide series. Cerium is the second element in the lanthanide series. The chemical symbol for Ytterbium is Yb. Since the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance, it is obvious, the density of a substance strongly depends on its atomic mass and also on the atomic number density (N; atoms/cm3). 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. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. We write this in front of the chemical symbol to the bottom-left. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. B) The nitrogen atom has a mass number of approximately 14 and an atomic number … The views of any element produced synthetically, and is found in the atomic structure protons present an! Explains what kind of information about you we collect, when you visit our website dense,,... Of other alkali metals, but it is not found free in nature occurring elements brittle crystalline solid room... C. it is not which may arise from the mineral samarskite from which it was isolated 7... 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Lutetium is a soft gray post-transition metal that tarnishes in air a fraction ( say!
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