Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. Francium is a highly radioactive metal that decays into astatine, radium, and radon. There are two reasons for the difference between mass number and isotopic mass, known as the mass defect: Note that, it was found the rest mass of an atomic nucleus is measurably smaller than the sum of the rest masses of its constituent protons, neutrons and electrons. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. contain at least one of the data types specified. Can J Anaesth. Arsenic - Atomic Mass - Atomic Weight - As, Actinium - Atomic Mass - Atomic Weight - Ac, Polonium - Atomic Mass - Atomic Weight - Po, Copernicium - Atomic Mass - Atomic Weight - Cn, What is Atomic Mass - Isotopic Mass - Definition, Nitrogen – Atomic Mass – Atomic Weight – N, Fluorine – Atomic Mass – Atomic Weight – F. Ozone ozone , an allotropic form of the chemical element oxygen (see allotropy). Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. Nickel belongs to the transition metals and is hard and ductile. Chlorine is a yellow-green gas at room temperature. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. The equivalent weight of molecular oxygen is 1) 32 2) 16 3) 8 4) 4 www.sakshieducation.com Its properties are thus intermediate between those of chlorine and iodine. Molecular oxygen synonyms, Molecular oxygen pronunciation, Molecular oxygen translation, English dictionary definition of Molecular oxygen. The molecular formula of the compound is 1.0k LIKES. Oxygen is a chemical element with symbol O and atomic number 8. Carbon is one of the few elements known since antiquity. The chemical symbol for Ytterbium is Yb. Many c… Oxygen has a molar mass of 15.9994 g/mol and nitrogen has a molar mass of 14.0067 g/mol. If we include man made elements, the densest so far is Hassium. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. 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. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. It is the heaviest essential mineral nutrient. The element X (atomic weight = 75) and Y (atomic weight = 16) combine to give a compound containing 75.8% X. Technology, Office of Data Characterized with this advantage, LightinTheBox have been enjoying highly popular as one leading Molecular Weight Oxygen wholesaler in … The molecular weight of oxygen is 32. The element and its compounds make up 49.2%, by weight, of the earth's crust. The name samarium is after the mineral samarskite from which it was isolated. Discoverer: Davy, Sir H. and Thénard, L.-J. Approximately 60–70% of thallium production is used in the electronics industry. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. Each nuclide is denoted by chemical symbol of the element (this specifies Z) with tha atomic mass number as supescript. www.nuclear-power.net. The chemical symbol for Promethium is Pm. The calculation therefore is 1 × 2 + 16 = 18 u, so the weight of one molecule of water is approximately 18 u. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. Molecular weight calculation: 15.9994*2 ›› Percent composition by element Molecular oxygen (O 2) is a diatomic molecule that is composed of two oxygen atoms held together by a covalent bond. The chemical symbol for Beryllium is Be. The chemical symbol for Mendelevium is Md. The most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds. Cerium is also traditionally considered one of the rare-earth elements. (1 u is equal to 1/12 the mass of one atom of carbon-12) Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 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. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. Major advantage of lead shield is in its compactness due to its higher density. It is occasionally found in native form as elemental crystals. 4.6k VIEWS. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. These weights may vary significantly from molecular It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. If one or more of the data types are checked, Arsenic is a metalloid. The limits of the range should be separated by a comma. 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. Thorium is moderately hard, malleable, and has a high melting point. Astatine is the rarest naturally occurring element on the Earth’s crust. Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars. Thallium is a soft gray post-transition metal is not found free in nature. The common allotrope of elemental oxygen on Earth, O 2, is generally known as oxygen, but may be called dioxygen, diatomic oxygen, molecular oxygen, or oxygen gas to distinguish it from the element itself and from the triatomic allotrope ozone, O 3.As a major component (about 21% by volume) of Earth's atmosphere, elemental oxygen is most commonly encountered in the diatomic form. Examples of molecular weight computations: CO2, SO2. The chemical symbol for Gold is Au. Philo incorrectly surmised that parts of the air in the vessel were converted into the classical element fireand thus were able to escape through pores in the glass. The chemical symbol for Astatine is At.