Add your answer and earn points. For uranium atom, the Van der Waals radius is about 186 pm = 1.86 ×10−10m. Praseodymium is a chemical element with atomic number 59 which means there are 59 protons and 59 electrons in the atomic structure. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. The chemical symbol for Cerium is Ce. According to the Einstein relationship (E=mc2), this binding energy is proportional to this mass difference and it is known as the mass defect. The chemical symbol for Thorium is Th. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. The standard SI unit is kilograms per cubic meter (kg/m3). For example, 63Cu (29 protons and 34 neutrons) has a mass number of 63 and an isotopic mass in its nuclear ground state is 62.91367 u. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. 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. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. All of its isotopes are radioactive. Zirconium is widely used as a cladding for nuclear reactor fuels. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. 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. Its properties are thus intermediate between those of chlorine and iodine. The atomic mass is carried by the atomic nucleus, which occupies only about 10-12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. It is the Pauli exclusion principle that requires the electrons in an atom to occupy different energy levels instead of them all condensing in the ground state. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. Curium is a chemical element with atomic number 96 which means there are 96 protons and 96 electrons in the atomic structure. The chemical symbol for Oxygen is O. 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). It occurs on Earth as the decay product of various heavier elements. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. The chemical symbol for Tantalum is Ta. Although neodymium is classed as a rare earth, it is a fairly common element. The chemical symbol for Americium is Am. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C. The chemical symbol for Zinc is Zn. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). The chemical symbol for Mendelevium is Md. Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. 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 Scandium is Sc. Yttrium is a chemical element with atomic number 39 which means there are 39 protons and 39 electrons in the atomic structure. The Standard English unit is pounds mass per cubic foot (lbm/ft3). Major advantage of lead shield is in its compactness due to its higher density. Uranium has the highest atomic weight of the primordially occurring elements. Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 electrons in the atomic structure. The size and mass of atoms are so small that the use of normal measuring units, while possible, is often inconvenient. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. The chemical symbol for Lutetium is Lu. The chemical symbol for Titanium is Ti. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. Europium is a chemical element with atomic number 63 which means there are 63 protons and 63 electrons in the atomic structure. Mass Percent: Chlorine: Cl: 35.453: 1: 100.000% ›› Calculate the molecular weight of a chemical compound. The chemical symbol for Nobelium is No. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. The actual molecular mass of chlorine is : (1) ... 117.86 x 10-24 g (3) 58.93 x 10-24 kg (4) 117.86 x 10-24 kg give a long explaination? The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. The chemical symbol for Caesium is Cs. Under standard conditions, it is the lightest metal and the lightest solid element. 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. The standard SI unit is kilograms per cubic meter (kg/m3). Einsteinium is the seventh transuranic element, and an actinide. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. Our Website follows all legal requirements to protect your privacy. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. The chemical symbol for Ytterbium is Yb. The chemical symbol for Radium is Ra. Lawrencium is the final member of the actinide series. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. Thulium is an easily workable metal with a bright silvery-gray luster. The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. The chemical symbol for Uranium is U. The chemical symbol for Praseodymium is Pr.