So, changing the number of protons changes the type of element, changing the neutrons creates different isotopes of the same element, and the interaction (loss, gaining, sharing) of electrons gives an element its properties. The model should show 59 protons and 27 neutrons. Naturally occurring cobalt (27 Co) is composed of 1 stable isotope, 59 Co. 28 radioisotopes have been characterized with the most stable being 60 Co with a half-life of 5.2714 years, 57 Co with a half-life of 271.8 days, 56 Co with a half-life of 77.27 days, and 58 Co with a half-life of 70.86 days. It is probably true that this element contains. The model should show 27 protons and 32 neutrons. The cobalt isotope found in nature (i.e. Which statement about the model is correct? All cobalt atoms have 27 protons. A certain element is listed as having an atomic mass of 63.5 amu. the combined number of protons and neutrons are the same. It produces two gamma rays with energies of 1.17 MeV and 1.33 MeV. Detailed decay information for the isotope cobalt-59 including decay chains and daughter products. 59 Co) is non-radioactive, and is an element found in rocks, soil, water, plants, animals and humans. CHECK MY ANSWERS!!!!!!! How many neutrons are there in the cobalt-59 nuclide? Cobalt-60 (60Co or Co-60) is a radioactive metal that is used in radiotherapy. Cobalt occurs naturally as only one stable isotope, cobalt-59. Isotopes Neutron number plus atomic number equals atomic mass number: ... Cobalt-59 is composed of 27 protons, 32 neutrons, and 27 electrons. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure.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. A student wants to create a model of a cobalt atom. Cobalt-60 is composed of 27 protons, 33 neutrons, and 27 electrons. The isotopes are based on the mass, which is varied by the number of neutrons. Mass Number: 59 Standard Atomic weight: 58.933 g/mol Atomic number (Z): 27 Electrons: 27 Protons: 27 Neutrons: 32 Period: 4 Group: 9 Block: d Element category: Transition metal Electrons per shell: K2, L8, M15, N2 Electron configuration: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 7 4s 2 D. The model should … Cobalt-60 is commonly used as a source of radiation for the prevention of food spoilage. Cobalt is the active center of a group of coenzymes called cobalamins. (1 point) A. Cobalt-60 is a commercially important radioisotope, used as a radioactive tracer and for the production of high-energy gamma rays. C. The model should show 27 protons and 27 neutrons. This is approximately the sum of the number of protons and neutrons in the nucleus. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Bombarding cobalt-59 nuclei with neutrons produces the nuclide cobalt-60. A food irradiation facility replaces the cobalt-60, a source of gamma rays, when the radioactivity level falls to 1/8 of its initial level. Where more than one isotope exists, the value given is the abundance weighted average. 32. How cobalt-60 and cobalt-59 can be the same element but have different mass numbers? Density is the mass of a substance that would fill 1 cm 3 at room temperature. Relative atomic mass The mass of an atom relative to that of carbon-12. 1) Cobalt has a mass number of 59 and an atomic number of 27. An isotope is a form of an element that differs by the number of neutrons present in the nucleus, thereby differing in mass number but not atomic number (number of protons). If two different nuclides have the same mass number, it must mean that. The identify of an element is determined by the number of protons. ****** B.
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