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.  Comments 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. (It does not matter what order the positions are used.) C. Has Less Than An Octet. This group of elements is sometimes called the chalcogens.    Rare Earth Elements, Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page. The chemical symbol for Selenium is Se . What Is the Electron Configuration of Selenium. The Number Of Lone Pair Electrons = The Number Of Bonding Electrons = The Total Number Of Electrons = 2. Selenium contains four unpaired electrons in its outermost orbital. 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. About This Site In selenium, the first energy level has two electrons in sub-shell s. The second energy level holds eight electrons. The U.S. Supreme Court: Who Are the Nine Justices on the Bench Today? Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. 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.    Alkali Metals By looking at the electron configuration of selenium, it is possible to determine how many electrons are in each sub-shell.  Links, Show Table With: The six electrons in the outermost shell allow selenium to have a variety of valence numbers. 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 … Therefore, six electrons are on its valence shell. Chlorine, Selenium, and bromine are located near each other on the periodic table. agreement.    Melting Point 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. Once we got the Lewis symbol down, it’s easy to explain why it’s HONC 1234. Se atomic no. The Lewis symbol is given on the left. Valence Electrons Chart - Valence Electrons of all the elements in table chart. Use of this web site is restricted by this site's license    Date of Discovery The electronegativity of Selenium is: χ = 2.55.    Other Metals 1. 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. Chemical Properties of Selenium. Has More Than An Octet. Atomic Number of Selenium. In selenium, the first energy level has two electrons in sub-shell s. The second energy level holds eight electrons. Author has 739 answers and 678K answer views As element 34, it has 34 electrons. From periodic table,we see that the atomic number of selenium is 34. The chemical symbol for Selenium is Se. Five of these isotopes are stable: 74 Se, 76 Se, 77 Se, 78 Se, and 80 Se. All Rights Reserved. On the periodic table, selenium is element number 34; it is located in group 16 below oxygen and sulfur.    Boiling Point Two electronsSelenium has six valence electrons. Nevertheless, check the complete configuration and other interesting facts about Selenium that most people don't know.    Atomic Number Here the outermost shell is uth shell. Sub-shell s has two, sub-shell p has six and sub-shell d has 10. What is the Lewis electron dot diagram for each element? B) 19 C) 35 D) 39 E) 59 24) Consider a neutral atom with 30 protons and 34 neutrons. Atomic number = Number of protons = 34. 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). 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. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.    Alkaline Earth Metals The electron configuration of selenium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4. The electron configuration for selenium is 1s22s22p63s23p64s23d104p4. Click on 'Element Atomic Number', 'Element Symbol', 'Element Name' and 'Element Valence Electrons' headers to sort. The electron configuration of an atom shows how the electrons are arranged in the atom's energy levels. These dots are arranged to the right and left and above and below the symbol, with no more than two dots on a side. Each electron is influenced by the electric fields produced by the positive nuclear charge and the other (Z – 1) negative electrons in the atom.    Noble Gases Atomic Number of Selenium is 34.. Chemical symbol for Selenium is Se. 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 23) What is the mass number of an atom of potassium that has 20 neutrons? ... selenium; Show Answer Check Your Learning. This configuration is also written as [Ar] 4s23d104p4, according to Dr. Anne Marie Helmenstine, a contributor to About.com.    Crystal Structure, Element Groups: 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 … The atomic number of the ; Atomic number of Selenium is 34. Fact Check: Is the COVID-19 Vaccine Safe? Each of the boxes will take up to 2 electrons maximum, amounting to a total of 8 electrons, representing octet. In the case of Selenium the abbreviated electron configuration is [Ar] 3d10 4s2 4p4.    Number of Neutrons 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. 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. 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. Holt Chemistry: Online Textbook Help As element 34, it has 34 electrons. Copyright © 1996-2012 Yinon Bentor. How Does the 25th Amendment Work — and When Should It Be Enacted? 2+8+18 is 28. Two of those electrons are in sub-shell s, while the other six are found in sub-shell p. Valence electrons of selenium will be placed in s and p-orbitals. So to get the number of electrons, you must subtract the size of charge (which is often written as a superscript on the right side of the symbol) from the atomic number or proton number. Q. Chlorine. How the COVID-19 Pandemic Has Changed Schools and Education in Lasting Ways. Selenium specifically has an electron configuration of 2-8-18-6. 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. Melting point of Selenium is 217 °C and its the boiling point is 685 °C. The number of dots equals the number of valence electrons in the atom.    Transition Metals Atomic weight of Selenium is 78.971 u or g/mol. 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. Sub-shells s, p, d and f hold a maximum of two, six, 10 and 14 electrons, respectively. Selenium is a member of the sulfur family with elements including tellurium and polonium. Explanation: Valence electrons are defined as the electrons present in the last shell of any element.    Atomic Mass Number of electrons in = 34+2 = 36. Which of these elements is the smallest atom? This page was created by Yinon Bentor.    Non-Metals    Electron Configuration The chemical symbol for Selenium is Se. Element Selenium (Se), Group 16, Atomic Number 34, p-block, Mass 78.971. so, total number of valence electrons in selenium is 2+ 4 = 6 . ... c. increase in number of protons d. fewer electrons in the highest occupied energy level. Increase in atomic size.  Help Number of protons in Selenium is 34. Therefore, the number of electrons in neutral atom of Selenium is 34. B. This configuration conveys a lot of important information about an element. 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. Sub-shells s, p, d and f hold a maximum of two, six, 10 and 14 electrons, respectively. Finally, the fourth energy level has a total of six electrons. 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 … Let’s use figure 2 as an example. Let’s start with hydrogen. Selenium has 36 electrons 34(atomic number) + 2(amount of electrons gained in the ion, has a 2- charge) = 36 2. 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.    Halogens This Valence Electrons chart table gives the Valence Electrons of all the elements of periodic table . Color of Selenium : grey, red & black The Central Selenium Atom ... A. Obeys The Octet Rule.    Name This family has six electrons in the outermost shell. It all depends on shells accepting an amount of electrons.    Metalloids The higher the associated electronegativity number, the more an element or compound attracts electrons … In the2nd energy level, there are 2 electrons … The number of electrons in an electrically-neutral atom is the same as the number of protons in the nucleus. 34 configuration - 3d10 4s2 4p4 orbital = 3rd orbital Atomic Mass of Selenium