selenium 79 electrons

Thus the answers for 415 mg of selenium come from multiplying the number 3.165x10^18 of Se atoms by 34 protons, 45 neutrons, 34 electrons, 4 energy levels and 6 valence electrons, respectively. a) 2 b) 4 c) 6 d) 8 8. Electron Affinity of Selenium is 195 kJ/mol. - e-eduanswers.com (4 marks) # of protons # of neutrons # of electrons 34 79 Se 28 59 Ni 2+ 52 128 Te 1-1 3 H 1+ 37. Fluorine. Why Is the Keystone XL Pipeline Still So Disputed? 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. Two additional electrons can go into the 2s shell-subshell, but now this subshell is filled with the maximum number of electrons. In chemistry and atomic physics, the electron affinity of an atom or molecule is defined as:. Sub-shells s, p, d and f hold a maximum of two, six, 10 and 14 electrons, respectively. Its half-life has been variously reported as 650,000 years, 65,000 years, 1.13 million years, 480,000 years, 295,000 years, 377,000 years and most recently with best current precision, 327,000 years. Germanium. Name: Selenium Symbol: Se Atomic Number: 34 Atomic Mass: 78.96 amu Melting Point: 217.0 °C (490.15 K, 422.6 °F) Boiling Point: 684.9 °C (958.05005 K, 1264.8201 °F) Number of Protons/Electrons: 34 Number of Neutrons: 45 Classification: Non-metal Crystal Structure: Hexagonal Density @ 293 K: 4.79 g/cm 3 Color: gray Atomic Structure What energy level is it on? Expert Answer . Five of these isotopes are stable: 74Se, 76Se, 77Se, 78Se, and 80Se. Selenium is a non-metal with several allotropes: a black, … The electron configuration for selenium is 1s22s22p63s23p64s23d104p4. Selenium is a nonmetallic chemical element found in trace amounts in human body. In the above, the most intense ion is set to 100% since this corresponds best to the output from a mass spectrometer. ( ) spin value – Indicates spin with weak assignment arguments. Argon. Its yield is low (about 0.04%), as it is near the lower end of the mass range for fission products. Selenium (Se) has an atomic number of 34 which means in a balance atom Se will have 34 protons and 34 electrons then Se has a mass of 79 so to get the neutrons we minus the protons from the â ¦ Concept introduction: The total number of electrons present in an atom is equal to its atomic number. Review 2000 (IUPAC Technical Report)", "Atomic weights of the elements 2005 (IUPAC Technical Report)", https://en.wikipedia.org/w/index.php?title=Isotopes_of_selenium&oldid=985947229, Articles to be expanded from October 2019, Creative Commons Attribution-ShareAlike License. There are 23 other unstable isotopes that have been characterized, the longest-lived being 79Se with a half-life 327,000 years, 75Se with a half-life of 120 days, and 72Se with a half-life of 8.40 days. Identify the nonmetal in period 3 that is less reactive than Sulfur. Selenium primarily occurs in vivo as selenocompounds, mostly selenoproteins such as glutathione peroxidase and thioredoxin reductase (enzymes responsible for detoxification). Selenium (Se). Sub-shell s has two, sub-shell p has six and sub-shell d has 10. This configuration is also written as [Ar] 4s23d104p4, according to Dr. Anne Marie Helmenstine, a contributor to About.com. Phosphorus. Please let me know. Fluorine. # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS). How many protons, neutrons, and electrons are in each atom or ion below? O 34 P+, 29 Nº, 63 E- 53 P+, 74 N°, 53 E- O 34 P+, 45 N°, 34 E- O 53 P+, 34 Nº, 52 E-This problem has been solved! 50 V has a mass of 49.947161u and an abundance of 0.250%. Identify the metalloid in period 4 with 4 valence electrons. P.C. ... Identify the metalloid in period 4 that is more reactive than Selenium. Researchers Are Now Much Closer to Finding Out. It can convert AC … How many electrons have ml=+2 There are two electrons in sub-shell s and four electrons in sub-shell p. The number of electrons in all of the energy levels adds up to 34. The first two electrons go into the 1s shell-subshell combination. "Atomic weights of the elements 2013 (IUPAC Technical Report)", "Atomic weights of the elements. Alone or in combination with Vitamin E, selenocompounds act as antioxidants. The number of electrons in an electrically-neutral atom is the same as the number of protons in the nucleus. Also the electron configuration of Se is [Ar]3d 10 4s 2 4p 4 so there are 4 energy levels and 6 valence electrons. 36 Electrons = Atomic Number + 2 extra electrons (hence the 2-) The chemical symbol for Selenium is Se . 15. In this case, there are fewer protons than electrons. The chemical symbol for Selenium is Se. For example, N 3-has a -3 charge which means it has 3 more electrons than a neutral nitrogen atom. Gold is a transition metal and a group 11 element. 12. The electron configuration of an atom shows how the electrons are arranged in the atom's energy levels. To determine how many total electrons there are, add the amount of charge to the atomic number. Electron Affinity. Correct answer to the question Se has an atomic number of 34 and an atomic mass of 79. Electron Affinity and Electronegativity of Selenium. Nitrogen’s atomic number is 7, therefore this ion has 10 electrons. In selenium, the first energy level has two electrons in sub-shell s. The second energy level holds eight electrons. 79.91652 g/mol: Computed by PubChem 2.1 (PubChem release 2019.06.18) Monoisotopic Mass: 79.91652 g/mol: Computed by PubChem 2.1 (PubChem release 2019.06.18) Topological Polar Surface Area: 0 Ų: Computed by Cactvs 3.4.6.11 (PubChem release 2019.06.18) Heavy Atom Count: 1: Computed by PubChem: Formal Charge-2: Computed by PubChem: Complexity: 0 The last three also occur as fission products, along with 79 Se, which has a half-life of … This page was last edited on 28 October 2020, at 22:11. See more Selenium products. 16. 36. The chemical symbol for Gold is Au. It converts light into electricity. Isotopic compositions and standard atomic masses from: Half-life, spin, and isomer data selected from the following sources. Each electron is influenced by the electric fields produced by the positive nuclear charge and the … Identify the metalloid in period 4 with four valence electrons ... 14. From “World News Tonight” to “The View,” Here’s How to Contact Your Favorite ABC TV Shows, Exactly Why Is the Platypus So Weird? Selenium (34Se) has six natural isotopes that occur in significant quantities, along with the trace isotope 79Se, which occurs in minute quantities in uranium ores. It decreases electrical resistance with increased illumination. 80 Se: 79.9165196 (19) 49.61 (41) 0: 82 Se: 81.9166978 (23) 8.73 (22) 0: Isotope abundances of selenium. The last three also occur as fission products, along with 79Se, which has a half-life of 327,000 years,[2][3] and 82Se, which has a very long half-life (~1020 years, decaying via double beta decay to 82Kr) and for practical purposes can be considered to be stable. 45 Neutrons = Atomic Mass. The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electron configuration is [Ar] 3d 10 4s 2 4p 4. Selenium has six natural stable isotopes: 74 Se (0.9%), 76 Se (9.4%), 77 Se (7.6%), 78 Se (23.8), 80 Se (49.6%), and 82 Se (8.7%). Show transcribed image text. Selenium-79 is a radioisotope of selenium present in spent nuclear fuel and the wastes resulting from reprocessing this fuel. In selenium, the first energy level has two electrons in sub-shell s. The second energy level holds eight electrons. Identify the nonmetal in period 4 that is more reactive than Selenium. ... Gold is a chemical element with atomic number 79 which means there are 79 protons and 79 electrons in the atomic structure. Of the other isotopes, 73Se has the longest half-life, 7.15 hours; most others have half-lives not exceeding 38 seconds. Finally, the fourth energy level has a total of six electrons. 29 29 29 35 Describe the general arrangement of subatomic particles in the atom. They are vanadium-50 and vanadium-51. Hydrogen selenide (H 2 Se) Sodium selenite (Na 2 SeO 3) Selenious acid (H 2 SeO 3) Selenium trioxide (SeO 3) Interesting facts: It is similar to sulfur in its form and compounds. The radioisotope selenium-75 is a powerful isotope used in selenium biochemistry. Electronegativity of Selenium is 2.55. It is one of only 7 long-lived fission products. By looking at the electron configuration of selenium, it is possible to determine how many electrons are in each sub-shell. There are five sub-shells, but only four of them are used by naturally occurring elements: s, p, d and f. Each sub-shell accommodates a certain number of electrons. Vanadium consists of 2 naturally occurring isotopes. Selenium is two electrons short of having a full valance shell, so a stable ion of selenium will have a 2- charge. Atoms—and the protons, neutrons, and electrons that compose them—are extremely small. Two of those electrons are in sub-shell s, while the other six are found in sub-shell p. The third energy level has a total of 18 electrons. Volcanic soils are enriched in selenium as are some coal deposits. How many electrons are on its outermost energy level? See the answer. 9 Protons 9 electrons 10 neutrons 7 valence electrons. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Uden, in Encyclopedia of Analytical Science (Second Edition), 2005 Selenium in the Environment. The selenium atom has a radius of 120 pm and a Van der Waals radius of 190 pm. Estate Planning 101: How to Probate a Will, The Differences Between “Defamation,” “Libel” and “Slander”. 51 V has a mass of 50.943962u and an abundance of 99.750%. the change in energy (in kJ/mole) of a neutral atom or molecule (in the gaseous phase) when an electron is added to the atom to form a negative ion. Question: Which Combination Of Protons, Neutrons, And Electrons Is Correct For Selenium-79? Two of those electrons are in sub-shell s, while the other six are found in sub-shell p. The third energy level has a total of 18 electrons. It usually occurs in the sulfide ores of the heavy metals but rarely as the free element. Indeed, the toxicity level of selenium to humans was established only 20 years ago by studies of Chinese victims of selenium poisoning, selenosis, who grew corn on selenium rich coal rocks. Identify the element with 79 electrons. selenium is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4. Sub-shells s, p, d and f hold a maximum of two, six, 10 and 14 electrons, respectively. This configuration conveys a lot of important information about an element. Identify the nonmetal in period 3 that is less reactive than Sulfur. Germanium. The n = 2 shell also has a p subshell, so the remaining two electrons can go into the 2p subshell. # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN). The chemical symbol for Selenium is Se . Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. Identify the element with 79 protons. Therefore, the number of electrons in neutral atom of Selenium is 34. What Is the Electron Configuration of Selenium. It emits γ rays with 0.265 eV (59%) and 0.280 eV (25%), and decays with a half-life time of 120.4 days. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal.

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