Correct answer to the question: The mass number of iodine is 126, and it’s in the 53rd place in the periodic table. The chemical symbol for Beryllium is Be. 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. It occurs on Earth as the decay product of various heavier elements. The chemical symbol for Promethium is Pm. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. The chemical symbol for Rubidium is Rb. The chemical symbol for Helium is He. Carbon is one of the few elements known since antiquity. The chemical symbol for Indium is In. Iodine-127 refers to an isotope of iodine with mass number {eq}A=127 {/eq}. Two radioactive isotopes of iodine used for the diagnosis and treatment of thyroid disease have mass numbers of 123 and 131, For each isotope, give the following information: (a) the number of protons; (b) the number of neutrons; (c) the number of electrons in the neutral atom; (d) the group number. At 0.099%, phosphorus is the most abundant pnictogen in the Earth’s crust. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. The chemical symbol for Caesium is Cs. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. The various species of atoms whose nuclei contain particular numbers of protons and neutrons are called nuclides. The chemical symbol for Ytterbium is Yb. The information contained in this website is for general information purposes only. The chemical symbol for Barium is Ba. There are two reasons for the difference between mass number and isotopic mass, known as the mass defect: Typical densities of various substances at atmospheric pressure. Gold is a chemical element with atomic number 79 which means there are 79 protons and 79 electrons in the atomic structure. 2005-08-08. Determine the numbers of protons, neutrons, and electrons in one of these iodine anions. 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 Gold is Au. The chemical symbol for Berkelium is Bk. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. Iodine, isotope of mass 128, at. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. 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. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. For other isotopes, the isotopic mass usually differs and is usually within 0.1 u of the mass number. The chemical symbol for Uranium is U. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. Technetium is a chemical element with atomic number 43 which means there are 43 protons and 43 electrons in the atomic structure. Since nucleons (protons and neutrons) make up most of the mass of ordinary atoms, the density of normal matter tends to be limited by how closely we can pack these nucleons and depends on the internal atomic structure of a substance. The atomic number is the value found associated with an element on the periodic table because it is the key to the element's identity. Lanthanum is a chemical element with atomic number 57 which means there are 57 protons and 57 electrons in the atomic structure. Actinium is a soft, silvery-white radioactive metal. Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. Chen on molar mass of iodine: Yes. It is the heaviest essential mineral nutrient. I would feel more comfortable if I knew what wounds you are referring to. Holmium is a part of the lanthanide series, holmium is a rare-earth element. Oil, wax or fats with high values are more … Mass was no longer considered unchangeable in the closed system. Nickel is a silvery-white lustrous metal with a slight golden tinge. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. 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. Our Website follows all legal requirements to protect your privacy. 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. Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. The chemical symbol for Cerium is Ce. The chemical symbol for Dysprosium is Dy. Typical densities of various substances are at atmospheric pressure. All of its isotopes are radioactive. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. The Standard English unit is pounds mass per cubic foot (lbm/ft3). More... Molecular Weight: 128.9138 g/mol. Tellurium is far more common in the universe as a whole than on Earth. Thulium is the thirteenth and third-last element in the lanthanide series. Atomic mass of Iodine is 126.90447 u. Create . Name: Iodine Symbol: I Atomic Number: 53 Atomic Mass: 126.90447 amu Melting Point: 113.5 °C (386.65 K, 236.3 °F) Boiling Point: 184.0 °C (457.15 K, 363.2 °F) Number of Protons/Electrons: 53 Number of Neutrons: 74 Classification: Halogen Crystal Structure: Orthorhombic Density @ 293 K: 4.93 g/cm 3 Color: blackish Atomic Structure Find the ratio of the number of moles of ICl and ICl, in the mixture. The standard SI unit is kilograms per cubic meter (kg/m3). 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 double bonds that are a major source of unsaturation react with iodine to form complex compounds.