The electron configuration of an atom is 1s 2 2s 2 2p 6.The number of valence electrons in the atom is Electron Configurations are an organized means of documenting the placement of electrons based upon the energy levels and orbitals groupings of the periodic table.. To determine the electron configuration of a particular atom, start at the nucleus and add electrons one by one until the number of … 0 0. The electron configuration of an atom shows the packing of electrons in the shells and orbitals of an atom. Electron configuration is the arrangement of electrons of an atom, a molecule, or other physical structure. The final ring or shell of electrons contains the typical number of valence electrons for an atom of that element. It concerns the way electrons can be distributed in the orbitals of the given system (atomic or molecular for instance). The Electron Configuration Of An Atom Shows A) The Maximum Number Of Electrons Each Energy Level Can Hold. This configuration conveys a lot of important information about an element. The electron shells are shown, moving outward from the nucleus. Source(s): electron configuration atom show: https://biturl.im/MCtjD. 1 decade ago. Oganesson (element 118 is a good example to show the order of the orbitals. The upper right side shows the number of electrons in a neutral atom. Each element has a unique atomic structure that is influenced by its electronic configuration, which is the distribution of electrons across different orbitals of an atom. C) A Diagram Of An Atomic Nucleus. There are 118 elements in the periodic table. 0 0. The periodic table can be a powerful tool in predicting the electron configuration of an element. Electron Configuration Chart for All Elements in the Periodic Table. Alternatively, write the symbol for the noble gas before an element (radon, in this case), and just add the extra information: H #1s^1# He #1s^2# Li #1s^2 2s^1# Be #1s^2 2s^2# B #1s^2 2s^2 2p^1# C #1s^2 2s^2 2p^2# N #1s^2 2s^2 2p^3# O #1s^2 2s^2 2p^4# F #1s^2 2s^2 2p^5# 2. Q. The electron configuration of an atom shows how the electrons are arranged in the atom's energy levels. The electron configuration of an atom shows the number of electrons in each sublevel in each energy level of the ground-state atom. Its electron configuration is: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 10 6p 6 7s 2 5f 14 6d 10 7p 6. E) The Number Of Isotopes Possible. The element atomic number and name are listed in the upper left. By looking at the electron configuration of selenium, it is possible to determine how many electrons are in … D) A Description Of The Shape Of Each Energy Level. B) The Number Of Electrons In Each Energy Level And Sublevel. 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