Step-2: We know that the atomic number of selenium is 34.So selenium has 34 protons and 34 electrons as the charge of electrons and protons are equal but opposite in nature.The charge of proton is … Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. The Number Of Lone Pair Electrons = The Number Of Bonding Electrons = The Total Number Of Electrons = 2. This Valence Electrons chart table gives the Valence Electrons of all the elements of periodic table . The electronegativity of Selenium is: χ = 2.55. The atomic Number of selenium is 34 The general electronic configuration of selenium is, 15 2 5# 2 p6 35# 3 p6 3 d 45 4P The valence electrons means number of elections in the outermost shell. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Single Covalent Bond: Definition & Examples From periodic table ,we see that the atomic number of selenium is 34. in the case of Sb, the highest period is 5 and it has 5 electrons (2 from 5S and 3 from 5P). Valence Electrons Chart - Valence Electrons of all the elements in table chart. 2. These dots are arranged to the right and left and above and below the symbol, with no more than two dots on a side. Which of these elements is the smallest atom?    Alkaline Earth Metals 23) What is the mass number of an atom of potassium that has 20 neutrons? All Rights Reserved. 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.    Rare Earth Elements, Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page. Symbol of Element : Se Atomic Number of Selenium : 34 Atomic Mass: 78.96 amu Melting Point: 217.0 °C - 490.15 °K Boiling Point: 684.9 °C - 958.05005 °K Number of Protons/Electrons in Selenium : 34 Number of Neutrons in Selenium : 45 Crystal Structure: Hexagonal Density @ 293 K: 4.79 g/cm 3. 2+8+18 is 28.  Comments Let’s use figure 2 as an example. Nevertheless, check the complete configuration and other interesting facts about Selenium that most people don't know. Selenium has 36 electrons 34(atomic number) + 2(amount of electrons gained in the ion, has a 2- charge) = 36 Increase in atomic size. From periodic table,we see that the atomic number of selenium is 34.    Halogens    Metalloids Here the outermost shell is uth shell. About This Site Valence electrons of selenium will be placed in s and p-orbitals. Holt Chemistry: Online Textbook Help As element 34, it has 34 electrons. The higher the associated electronegativity number, the more an element or compound attracts electrons … Electrons per Energy Level: 2,8,18,6 Shell Model; Ionic Radius: 0.5Å; Filling Orbital: 4p 4; Number of Electrons (with no charge): 34; Number of Neutrons (most common/stable nuclide): 45; Number of Protons: 34; Oxidation States: ±2,4,6; Valence Electrons: 4s 2 p 4 Electron Dot Model. Selenium (34 Se) has six natural isotopes that occur in significant quantities, along with the trace isotope 79 Se, which occurs in minute quantities in uranium ores. Once we got the Lewis symbol down, it’s easy to explain why it’s HONC 1234. In the case of Selenium the abbreviated electron configuration is [Ar] 3d10 4s2 4p4. The six electrons in the outermost shell allow selenium to have a variety of valence numbers. Chlorine, Selenium, and bromine are located near each other on the periodic table. The chemical symbol for Selenium is Se. Copyright © 1996-2012 Yinon Bentor. Fact Check: Is the COVID-19 Vaccine Safe? Sub-shells s, p, d and f hold a maximum of two, six, 10 and 14 electrons, respectively. Selenium contains four unpaired electrons in its outermost orbital.    Date of Discovery By looking at the electron configuration of selenium, it is possible to determine how many electrons are in each sub-shell. Q.    Other Metals    Atomic Number 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.    Name    Atomic Mass The electron configuration for selenium is 1s22s22p63s23p64s23d104p4. The U.S. Supreme Court: Who Are the Nine Justices on the Bench Today? The number of electrons in an electrically-neutral atom is the same as the number of protons in the nucleus. Atomic number = Number of protons = 34. All atoms try to achieve bliss and happiness by getting a full outer shell of eight electrons except for the first five, they are content with two.    Number of Neutrons agreement. Two of those electrons are in sub-shell s, while the other six are found in sub-shell p. This family has six electrons in the outermost shell. Each of the boxes will take up to 2 electrons maximum, amounting to a total of 8 electrons, representing octet. Selenium specifically has an electron configuration of 2-8-18-6. This configuration conveys a lot of important information about an element. 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. In selenium, the first energy level has two electrons in sub-shell s. The second energy level holds eight electrons. Finally, the fourth energy level has a total of six electrons. Number of electrons in = 34+2 = 36. Use of this web site is restricted by this site's license This configuration is also written as [Ar] 4s23d104p4, according to Dr. Anne Marie Helmenstine, a contributor to About.com. What Is the Electron Configuration of Selenium.    Alkali Metals The electron configuration of selenium which has 34 electrons is: $$\rm 1s^2~ 2s^2~ 2sp^6~ 3s^2 ~3p^6~ 4s^2~ 3d^{10}~ 4p^4$$ To check how many unpaired electrons there are, the … In general, an atom’s electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. Therefore, six electrons are on its valence shell. Explanation: Valence electrons are defined as the electrons present in the last shell of any element.    Transition Metals What is the Lewis electron dot diagram for each element? Color of Selenium : grey, red & black It all depends on shells accepting an amount of electrons. the periodic table, and the superscript 4 is how many electrons are in that orbital.This shows thatin energy level 1, there are 2 electrons in the s orbital. These electrons can form bonds with other elements and are called valence electrons. 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 On the periodic table, selenium is element number 34; it is located in group 16 below oxygen and sulfur. Element Selenium (Se), Group 16, Atomic Number 34, p-block, Mass 78.971. The chemical symbol for Selenium is Se . Atomic Number of Selenium.    Boiling Point Chlorine. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Each electron is influenced by the electric fields produced by the positive nuclear charge and the other (Z – 1) negative electrons in the atom.    Non-Metals    Noble Gases Click on 'Element Atomic Number', 'Element Symbol', 'Element Name' and 'Element Valence Electrons' headers to sort. Atomic Number of Selenium is 34.. Chemical symbol for Selenium is Se. The chemical symbol for Selenium is Se. Let’s start with hydrogen. B. Sub-shell s has two, sub-shell p has six and sub-shell d has 10. Selenium is a member of the sulfur family with elements including tellurium and polonium. The electron configuration of an atom shows how the electrons are arranged in the atom's energy levels. Atomic Number of Selenium Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure.  Links, Show Table With: 1. 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. 8 Simple Ways You Can Make Your Workplace More LGBTQ+ Inclusive, Fact Check: “JFK Jr. Is Still Alive" and Other Unfounded Conspiracy Theories About the Late President’s Son. 34 configuration - 3d10 4s2 4p4 orbital = 3rd orbital Chemical Properties of Selenium. The electron configuration of selenium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4. B) 19 C) 35 D) 39 E) 59 24) Consider a neutral atom with 30 protons and 34 neutrons. Sub-shells s, p, d and f hold a maximum of two, six, 10 and 14 electrons, respectively. What is the difference between the number of electrons in an atom of Selenium (Se) which has an atomic number of 34, and the number of electrons in an atom of … The number of dots equals the number of valence electrons in the atom. C. 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