Number of electron shells in period 3. Each halogen has maximum electron affinity in a period but in halogen family, it decreases from fluorine to iodine. Neon. The metals present in period 3. A) Si B) Al C) Na D) Mg. ... halogen D) alkali metal. In a quantum mechanical description of atomic structure, this period corresponds to the buildup of electrons in the third (n = 3) shell, more specifically filling its 3s and 3p subshells.There is a 3d subshell, but—in compliance with the Aufbau principle—it is not filled until period 4.This makes all eight elements analogs of the period 2 elements in the same exact sequence. 3. Halogen Electronic Configuration; Fluorine: 1s 2 2s 2 2p 5: Chlorine [Ne]3s 2 3p 5: Bromine [Ar]3d 10 4s 2 4p 5: Iodine [Kr]4d 10 5s 2 5p 5: Astatine [Xe]4f 14 5d 10 6s 2 6p 5 The least active metal of those represented below has an electron configuration abbreviated as. When halogens get electrons they give up energy. The halogen in period 3 is chlorine, and there are 17 electrons to account for. ns 1 ns 2 np 3 ns 2 np 5 ns 2 np 6 II) Periodic Trends 1) Arrange the following in order of decreasing atomic radii. Consider an element whose outermost electron configuration is 3d104s24px a. The highest occupied electron shell is called the valence shell , and the electrons occupying this shell are called valence electrons . A noble gas having electronic configuration 1s2 2s2 2p6. To play this quiz, please finish editing it. 18Ar. 10) Which is an outer electron configuration of a halogen? This quiz is incomplete! b. The valence shell electronic configuration of these electrons is ns 2 np 5. Na Mg Al. Electron Configuration and the Periodic Table , Chemistry 4th - Julia Burdge | All the textbook answers and step-by-step explanations Meet students taking the same courses as you are! These electron configurations are exceptionally stable. Electronic Configuration of Group 17 Elements. 1s2, 2s2 2p6, 3s2 3p5 Chlorine. Thus, there are 7 electrons in the outermost shell of these elements. A halogen in period 3. Delete Quiz. Let’s now look at the electronic configuration of these elements. The order of electron affinity is, Cl > F> Br > I. If it is a halogen, what is the value of … To play this quiz, please finish editing it. Which elements are … The element misses out on the octet configuration by one electron. O, Rb, Ca and Mg Rb Ca Mg O 2) Write the full electron configuration for each ion. Potentially, a halogen atom could hold one more electron (in a p orbital), which would give the resulting halide ion the same arrangement (configuration) as that of the noble gas next to it in the periodic table. Which of the following period 3 elements has the least metallic character? This quiz is incomplete! To which period does the element belong? In the third period of the table, the atoms all have a neon-like core of 10 electrons, and shell #3 is occupied progressively with eight electrons, starting with the 3s-orbital. Electron affinity is the energy released when an electron is added to neutral gaseous atom forming a univalent negative ion. In the writing the electron configuration for 24 CR the noble gas to use as a shorthand symbol is. Table 1.1: Electron configurations of the halogens. Join a Numerade study group on Discord 2-8-18-18-2. Bi: [Xe]6s 2 4f 14 5d 10 6p 3 b. the halogen in period 3 that is part of a bleaching compound used in paper production Cl: [Ne]3s 2 3p 5 c. the transition metal that is a liquid at room temperature; is sometimes used in outdoor security lights Hg: [Xe]6s 2 4f 14 5d 10 48. Atomic structure.
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