relative atomic mass of oxygen

The chemical symbol for Tantalum is Ta. The chemical symbol for Promethium is Pm. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. For 12C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. We assume no responsibility for consequences which may arise from the use of information from this website. Therefore, we cannot determine the neutron number of uranium, for example. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 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. To complete this calculation, you have to know what substance you are trying to convert. 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. Nickel is a silvery-white lustrous metal with a slight golden tinge. 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 Holmium is Ho. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. © 2019 periodic-table.org / see also We can determine the neutron number of certain isotope. The chemical symbol for Americium is Am. Francium is an alkali metal, that has one valence electron. Browse the list of Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden. The difference between the neutron number and the atomic number is known as the neutron excess: D = N – Z = A – 2Z. The chemical symbol for Antimony is Sb. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Atomic Mass # of Atoms : Mass Percent: Magnesium: Mg: 24.3050: 1: 20.192%: Oxygen: O: 15.9994: 4: 53.168%: Sulfur: S: 32.065: 1: 26.639% ›› The chemical symbol for Berkelium is Bk. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. Atomic Mass Number – Does it conserve in a nuclear reaction? The Cookies Statement is part of our Privacy Policy. 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. Under standard conditions, it is the lightest metal and the lightest solid element. The chemical symbol for Samarium is Sm. According to the Einstein relationship (E=mc2), this binding energy is proportional to this mass difference and it is known as the mass defect. Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 electrons in the atomic structure. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Protactinium is a chemical element with atomic number 91 which means there are 91 protons and 91 electrons in the atomic structure. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. The chemical symbol for Rubidium is Rb. The chemical symbol for Oxygen is O. The chemical symbol for Polonium is Po. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. 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). Lead is widely used as a gamma shield. Its extreme rarity in the Earth’s crust, comparable to that of platinum. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 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. 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 various species of atoms whose nuclei contain particular numbers of protons and neutrons are called nuclides. Atomic Mass of Oxygen. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. Tungsten is an intrinsically brittle and hard material, making it difficult to work. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. 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 Cerium is Ce. The densest material found on earth is the metal osmium, 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 Radium is Ra. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Silver is a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars. The chemical symbol for Aluminum is Al. Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Relative atomic mass = 16 x 99.762% + 17 x 0.038% + 18 x 0.200% = 16.008 The actual masses of individual oxygen atoms are not whole numbers even though their mass numbers are whole numbers. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. 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. One atomic mass unit is equal to 1.66 x 10-24 grams. The chemical symbol for Neodymium is Nd. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. The chemical symbol for Magnesium is Mg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure.

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