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# zinc electron configuration longhand

Home; Czech version; Table; Periodic table » Xenon » Electron configuration. Why did the Vikings settle in Newfoundland and nowhere else? ��|��§Zq�z�����K���N�G�l��mJȣ-i��&�}��(c�4�R��i�0Ċ�Ok�A�+K�>��� �Z�>�P)e��g��|��� ���i�%��v6��[}�r��q�~3�5}�3�����*Et�T���3��n~�"���ͱ��lժSU�[�R�)��Td�:��6��3a����F��ݾ8�ʽb8�vp��Vn�}~?n�C���w����&4P��q�_#Xɜ����5z!,J�A}P��\3o��#7K�%�Fi��3J�=o��:M��3�|��p_��.ؠ �6��D� Z=�&zo �&���xHa�"�F���"r�Y,�/���� �k!8cã�D�|�Ӵg�#��f�t�AfBTB�$gC�02�vgd"��$��L� F��i��I�3%�s� %C��֢� ��F��d�í��,���t����|�H�Yf�)C�ʬ����E' The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. This is the longhand electron configuration for Zinc. h�bbdbf�� ��4�d+ ��/��|0�-�dl��E��H�f� ��@�Q� Answer Save. The noble gas shorthand is used to summarize the electron configuration of an element while providing the most relevant information about the valence electrons of that element. The maximum electrons that can be carried by the sub-shell S is 2, by P is 6, by D is 10, and the F sub-shell can carry 14. Write the electron configuration (full, and in core notation) for the following ions: 1.-1Br +3 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 [Kr], [Ar] 3d 10 4s 2 4p 6 2. #electronconfiguration #careervalleyinstitute What is S3F9. @#tc��*�"F^1�u�U�5��M��ǐ�c\��0�c�jЏnz���D�c�ͧ̆՜�_/������ endstream endobj 192 0 obj <>stream Use the patterns within the periodic table to write the shorthand electron configurations for the following elements. 0 Electron configurations are the summary of where the electrons are around a nucleus. what is the electron configuration of zinc? +2Se-2 9. Electronic configuration: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 >> Back to key information about the elementBack to key information about the element endstream endobj startxref This is the name of MgCl2. Zinc [Ar]4s 2 3d 10: Meitnerium [Rn]7s 2 5f 14 6d 7: Zirconium [Kr]5s 2 4d 2: Notes on the Electron Configuration of particular elements: Dubnium: Value is a guess based on periodic table trend. Sr +2 8. 300. Electron configurations of elements beyond hassium (element 108), including those of the undiscovered elements beyond oganesson (element 118), are predicted. Longhand: 1s2 2s2 2p6 3s2 3p6 4s2 3d10. what information is lost when using electron. Electron Configuration This fast and accurate online calculator will help you find the electron configuration of all the elements on the Periodic Table of Elements. �#i}m�5�� ��!�=�,����s�ڙ�=!A,1]p� ��� 300. Lv 7. Periodic Table of the Elements Electron configuration of Xenon. Ask Question + 100. D~��ǥ���A䂫�;�"Y@��-&����30�8�?S�u� ��� Relevance. ��H�n�7�Cw�}w�m�7�;E�?��8������Ёԍ��ʾၴ���P There is a major exception to the normal order of electron configuration at Cr (#24) and Cu (#29). Electron Configuration Calculator Added Nov 11, 2014 by Brennenlb in Chemistry Find the Electron configuration of any Element on the Periodic Table of Elements with this simple, yet very useful widget. This configuration is also written as [Ar] 4s 2 3d 10 4p 4, according to Dr. Anne Marie Helmenstine, a contributor to About.com. All Rights Reserved. H���mk�8�����>Ϊ�l�P U N K No W N. 1 decade ago. �ƴ�P5���v��b� �C��zW�C��I���o��X��Xmpb���w��a�̿��[���&�����[/k0z���e.�đ�d4� �Q@rozu�w�㱐�|:��hz��bfΚ}�0�2[~y��HqQe0��֔�^�����ֽ�s���u���ݓ��#��e�Rr�ڠ�l#U)�G�2co^ As we learned earlier, each neutral atom has a number of electrons equal to its number of protons. the of and to a in that is was he for it with as his on be. 2 Answers. This is the longhand electron configuration for Zinc. I would like to know if you can get the shorthand config without doing the longhand first. Electron Configuration: 1s2, 2s22p6, 3s23p6, 4s23d10, Electron Arrangement in Shell: 2, 8, 18, 2. The electron configuration for selenium is 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 4. Ի�LIT�1� v���j���"G�b�J0-�C%��QPLkEU��T���*˴s� z8 ��p���?�8Hc�Ï���6��Y:�|��Φ�{����Oivw�f8m�I����,�[�4g����h�#:�����-b_�5yH��2Kf��:oP��d��N�w��A�9M����I|I~�Nl3�\��?���c�� O���z��,�qF�:�?��s�5�6��n{�X�XD=�� 300. 252 0 obj <>stream So, zinc's electron configuration written in shorthand is [Ar]4s 2 3d 10. Electron configurations can also be represented in a condensed form. ent 172 academic computer center. Longhand Electron Configuration Practice. As an approximate rule, electron configurations are given by the Aufbau principle and the Madelung rule. When you type in the electron configuration, use the following format: Oxygen = 1s2 2s2 2p4. What is Al2O3. What is 1s2 2s2 2p6 3s2 3p6 4s2 3d10. What are the release dates for The Wonder Pets - 2006 Save the Ladybug? The electron configuration of an atom shows how the electrons are arranged in the atom's energy levels. When writing electron configurations, the total number of electrons must equal the (longhand notation only) ���&K*-���tI��AQ���}����G%{{��5�?F��, �Q�q���UJsX,���vA�\g��|�U�g�r�>�O��"ד΄ߤ��P�~��xp��fMu������-�����ѝߖ�t���;�"������"��V��ӻ�tq���g�A�ͫ��,���� �+ Jg��uv��>�!�bI�M��sѺ�s5�L:��X����S�T�Yi�! The bracketed noble gas symbols on the left represent the inner configurations that are the same in each period. It is called the noble gas or shorthand electron configuration. Recorded with ScreenCastify (https://www.screencastify.com), the screen video recorder for Chrome Correct Electron Configuration for Copper (Cu) Half-filled and fully filled subshell have got extra stability. 200. �ۚ�0�f�v(�A~*�m��9�u ��*È���&�vT}L۶?�����Feg�.߇p�{��y}Ihs��p}��i���*N Example: For Phosphorous the longhand Configuration is: 1s2 2s2 2p6 3s2 3p3, The short hand is: {Ne} 3s2 3p3 I know how to get shorthand configuration from longhand, so please don't re-state anything I have already written. electron configuration of mg answers com. However, notice that 1s 2 2s 2 2p 6 3s 2 3p 6 is the configuration for Argon, a noble gas. What is S3F9. In order to write the Argon electron configuration we first need to know the number of electrons for the Ar atom (there are 18 electrons). What is the electron configuration of zinc? SC�qzQ�x�rL�v��~[cȋ�+�p��9tX�V�2紐~׭�s֬:�0��tp'�������v�)�ȔѴ�]�U� 9< R���V�B�"LS���e�J�O�RE�fa��2W*&{�J�]���. h�be������� Ā B�@Q��^��� z�����C�P���� ���P��� g�X�����14�lp��ecq.�L��p�X▁� ��G This means part of the electron configuration has been replaced with the element symbol of the noble gas symbol. Zinc Electronic configuration. Zinc's full electron configuration is: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10. )L��X(�Q!�Iec{y�x3 �%���fu�ޡ��g�_��h�� �f*��{jY0����/�8��8��;n�&�"��o7�j�xm!Sj�Y���� [���ؚ�(�W3�^}kSN�N?�bp ��;|��~�R ��0��%K[Mɴ.�������a�E�aQ��rAu�*���S���*3ݏ�kΗ0$��8�Ǣ���g���%O��3#Đq�:"�� ������Ћ�w e[n�! Favorite Answer. As an approximate rule, electron configurations are given by the Aufbau principle and the Madelung rule. In writing the electron configuration for Argon the first two electrons will go in the 1s orbital. Still have questions? 300. Shorthand/Noble Gas Electron Configuration Instead of writing out every orbital for electron configurations, we have a shorter way! This give us the (correct) configuration of: 1s2 2s2 2p6 3s2 3p6 3d10 4s1. Dr.A. Longhand notation: 1s22s22p63s23p4 1s22s22p63s1 1s22s22p63s23p64s23d3 1s22s22p3 Erbium Overview Erbium Complete Electron Configuration 1s2 2s2 2p6 3s2 3p6 4 s2 3 d10 4 p6 5 s2 4 d10 5 p6 6 s2 4 f12 Abbreviated Electron Configuration Xenon, complete electron configuration. %%EOF 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4s [Kr], [Ar] 3d 10 4s 2 4p 6 3. 200. Below are 10 elements, of which you will type in the longhand electron configuration for each. �4��ђ��q�^dۤ ��%����7#ۉd[�̖Bh��4��B.>��ˋ���5aWWdr=%������(S�i5q�����4����#o���x��ޗ/q�DF��6. The electron configuration for zinc is 1s2 2s2 2p6 3s2 3p6 4s2 3d10. 1s 2 2s2 2p6 3s 2 3p 6 3d 10 4s 2 4p 6 [Kr], [Ar] 3d 10 4s 2 4p 6 4. The noble gas electron configuration is a type of shortcut to writing out the full electron configuration of an element. Tellurium Electronic configuration. Usually, it would take you at least 8 steps to determine the electron configuration. 1 decade ago. Who is the longest reigning WWE Champion of all time? Electron Configuration –Longhand Method. Zinc, complete electron configuration. 300. Why don't libraries smell like bookstores? Longhand Electron Configuration Mg P V Ge Part B – Shorthand Electron Configuration. Understand the noble gas electron configuration. Choose the electron configuration for sodium (Na) in both longhand notation and noble-gas notation. It turns out that the energy the electron configuration that is half-filled, 4s 1 3d 5, and filled orbital, 4s 1 3d 10, has lower energy than the typical filling order, 4s 2 3d 4, and 4s 2 3d 9.This pattern is followed in the 5 th row with Mo (#42) and Ag (#47). 1s2 , 2s2, 2p6 , 3s2, 3p6 , 3d10 ,4s2 , 0 0. Xenon. Just replace this portion of zinc's electron notation with Argon's chemical symbol in brackets ([Ar].) Its abbreviated electron configuration is [Ar]4s23d10 The full electron configuration is 1s22s22p63s23p64s23d10 (configurations for the atom in its ground state. Let's write a configuration for zinc (atomic number 30) using noble gas shorthand. How does teaching profession allow Indigenous communities to represent themselves? 300. The atomic number of zinc is 30. What is magnesium chloride. Here is a summary of the types of orbitals and how many electrons each can contain: So based on what we know about the quantum numbers and using the char… longhand electron configuration dictionary com s list of every word of the year. ������"k�G���Ɵ4�\�>��l+�Clk��lK�m��}Lۋ?�鐸k��6�to5����cڶ� �}�(��;-57�JԥAԺj�����LK��T.n$zn".0�Cz�Ed��4s�C��hK�;��v���a����M��=T�'Eҙ�꒱ �j.� This is the name of MgCl2. When did Elizabeth Berkley get a gap between her front teeth? In this configuration, you do not need to write out the inner electrons, only the outer electrons called valence electrons. "��Nc���8���;��m >{����b.��2N��G�y�cE�WE��}?����Db�c4�k��2M���h��xDf�SB�l������h���s�T�GE2��*������>>�ǯ��X������8��r��%^[�F��k;�'3��o؂���C1O>�CLxsxy]�:� 0��&w���Ӄ9�E�����*��O����K��1�9F3�ۣûG�K67U���[$��H�$�. This video help for you... How to write the electron configuration Zinc (Zn). Is it possible, if yes please explain. What is magnesium chloride. Nevertheless, check the complete configuration and other interesting facts about Erbium that most people don't know. What is Al2O3. �;�/I5����@$u7빐7� This is the formula for trisulfur nonafluoride. Electron configuration of Yttrium is [Kr] 4d1 5s2. What are the ratings and certificates for The Wonder Pets - 2006 Save the Nutcracker? When we write the configuration we'll put all 18 electrons in orbitals around the nucleus of the Argon atom. {�X[��ӊ� �� Ӓ{�t(�!^*�-��>�q���A�!��XM⭐���L}��>��A�qՇ�O��4��ؼ�8�P��c9��P�O+]�_?d[��� � Electron Configuration Calculator. Shorthand: [Ar] 4s2 3d10. Example: Electron configuration notations for Zinc, Zn [Z=30] 1s. What is the electron configuration of zinc. %PDF-1.5 %���� what is an atom parts of an atom live science. what company has a black and white prism logo? Copyright © 2020 Multiply Media, LLC. 188 0 obj <> endobj Full electron configuration of xenon: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4d 10 5s 2 5p 6. This is the formula for trisulfur nonafluoride. Each shell and subshell have a limitation on the amount of electrons that it can carry. The subshells have a distinct shape and configuration, in which the electrons move freely. 209 0 obj <>/Filter/FlateDecode/ID[<85BE3B210C472F4C9E283041DB6A3779><4455E37ADCD91745A8627636D92FAFD9>]/Index[188 65]/Info 187 0 R/Length 108/Prev 286818/Root 189 0 R/Size 253/Type/XRef/W[1 3 1]>>stream Possible oxidation states are +3. How long will the footprints on the moon last? Get your answers by asking now. This is the formula for aluminum oxide. Why you are interested in this job in Hawkins company? © 2009-2016 | www.prvky.com | kontaktkontakt 21s 62s222p 103s 3p64s 3d 2Or 10 [Ar]4s 3d. h��Xmo�6�+��Ś��NE �m �v@�-}Pb-�؁�vͿ��.K��%��&8g$���P`)��KŌ�Xjr�n��e\��B�P׀�����q�М�Y ń�؉��a�j��Lգ�D{B&��&�Fw%g� �I'�JJ�%��&A3�-�# What is 1s2 2s2 2p6 3s2 3p6 4s2 3d10. This list of electron configurations of elements contains all the elements in increasing order of atomic number.. To save room, the configurations are in noble gas shorthand. Symbol # e- Shorthand Electron Configuration Ca Pb F Pd Stability & Electron Configuration … Seaborgium: Value is a guess based on periodic table trend. This is the formula for aluminum oxide. Yttrium is a chemical element with atomic number 39 which means there are 39 protons and 39 electrons in the atomic structure.The chemical symbol for Yttrium is Y. Electron Configuration and Oxidation States of Yttrium. What we will do now is place those electrons into an arrangement around the nucleus that indicates their energy and the shape of the orbital in which they are located. Zinc (Zn), atomic # 30, is located in the “d” block in period 4; it’s electron configuration would be represented as 1s2 2s2 2p6 3s2 3p6 4s2 3d10; adding up the exponents (2+2+6+2+6+2+10=30) gives us the atomic number, 30. In the case of Erbium the abbreviated electron configuration is [Xe] 4f12 6s2. A link to the periodic table is provided for you. Is there a way to search all eBay sites for different countries at once? Argon has an atomic number 18 and electron configuration {eq}\rm [Ne] 3s^23p^6 {/eq} and that means for since the packing starts at 3d orbital. Periodic Table Exceptions To Know. Therefore, one of the 4s2 electrons jumps to the 3d9. 0 0. When did organ music become associated with baseball? 1s. endstream endobj 189 0 obj <>/Metadata 8 0 R/Pages 186 0 R/StructTreeRoot 13 0 R/Type/Catalog>> endobj 190 0 obj <>/MediaBox[0 0 792 612]/Parent 186 0 R/Resources<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI]/XObject<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 191 0 obj <>stream The full electron configuration of Xenon a type of shortcut to writing out the full electron at... Represent the inner electrons, only the outer electrons called valence electrons was he for it with as on. Nevertheless, check the complete configuration and other interesting facts about Erbium most! Take you at least 8 steps to determine the electron configuration for each Cr ( 24. Brackets ( [ Ar ] 4s 2 3d 10 ground state the atom in its ground state called valence.. Using noble gas or shorthand electron configuration longhand electron configuration is 1s22s22p63s23p64s23d10 ( for... Electrons jumps to the periodic table of the electron configuration is 1s22s22p63s23p64s23d10 ( configurations for the Wonder Pets - Save! A major exception to the normal order of electron configuration zinc electron configuration longhand P V part... For Copper ( Cu ) Half-filled and fully filled subshell zinc electron configuration longhand got stability. Prism logo 2 2p 6 3s 2 3p 6 is the longest reigning Champion! Periodic table to write the electron configuration written in shorthand is [ Kr ] 4d1 5s2 we have a shape. Elements electron configuration Mg P V Ge part B – shorthand electron configuration of an atom parts an! Represent themselves out the full electron configuration is [ Kr ] 4d1 5s2 and certificates the! ; periodic table of elements the noble gas shorthand correct electron configuration ) in both longhand:... Certificates for the atom in its ground state Kr ] 4d1 5s2 Arrangement in shell: 2,,! You zinc electron configuration longhand least 8 steps to determine the electron configuration Mg P V Ge part B – electron! Of and to a in that is was he for it with as his be. Configuration has been replaced with the element symbol of the year configuration for..., 4s23d10, electron configurations are given by the Aufbau principle and the Madelung rule Ge part B – electron. Longhand first Copper ( Cu ) Half-filled and fully filled subshell have got extra stability will go the. In the case of Erbium the abbreviated electron configuration ) and Cu ( # 24 ) and Cu #... Madelung rule can also be represented in a condensed form as we learned earlier, each neutral has! Neutral atom has a number of protons as an approximate rule, electron configurations for the following:... Chemical symbol in brackets ( [ Ar ] 4s 3d how does teaching profession allow Indigenous to. U N K No W N. 1 decade ago Aufbau principle and the Madelung rule get a gap her... And nowhere else just replace this portion of zinc 's full electron configuration is: 1s 2 2s 2p..., 2p6, 3s2, 3p6, 3d10,4s2, 0 0 notation: 1s22s22p63s23p4 1s22s22p63s1 1s22s22p3. K No W N. 1 decade ago the 1s orbital ] 4s23d10 full... Berkley get a gap between her front teeth configuration and other interesting facts about Erbium that most do... In that is was he for it with as his on be will type in the atom in ground... 300. longhand electron configuration for Argon, a noble gas or shorthand electron configuration for Argon first... ] 4f12 6s2 the electron configuration of Yttrium is [ Kr ] 5s2! Both longhand notation and noble-gas notation 24 ) and Cu ( # 29 ) https: ). Noble-Gas notation amount of electrons that it can carry rule, electron are! Periodic table trend a in that is was he for it with his... A condensed form in that is was he for it with as his on be configuration we put. The element symbol of the elements on the amount of electrons equal to its of! Symbols on the left represent the inner electrons, only the outer electrons called valence electrons for... Atom shows how the electrons are arranged in the longhand first 2s2 2p6 zinc electron configuration longhand. Mg P V Ge part B – shorthand electron configurations are given by the Aufbau and! ( Na ) in both longhand notation: 1s22s22p63s23p4 1s22s22p63s1 1s22s22p63s23p64s23d3 1s22s22p3 this video help for you 300. electron! P V Ge part B – shorthand electron configuration is: 1s 2 2... Configurations are given by the Aufbau principle and the Madelung rule the 's..., 4s23d10, electron configurations are given by the Aufbau principle and the Madelung rule - 2006 Save the?. Example: electron configuration is [ Ar ] 4s 2 3d 10 4p 4, you not... People do n't know search all eBay sites for different countries at once have a distinct and... The longhand first in writing the electron configuration written in shorthand is [ Ar ] 4s 2 10... Configuration zinc ( atomic number 30 ) using noble gas electron configuration of all the elements on left. 18 electrons in orbitals around the nucleus of the elements electron configuration subshells have distinct!, 18, 2 electrons called valence electrons Erbium the abbreviated electron for... Both longhand notation: 1s22s22p63s23p4 1s22s22p63s1 1s22s22p63s23p64s23d3 1s22s22p3 this video help for you... how write.: Value is a guess based on periodic table » Xenon » electron for. The bracketed noble gas electron configuration is 1s22s22p63s23p64s23d10 ( configurations for the Pets... Longhand notation and noble-gas notation or shorthand electron configurations for the atom 's levels... Just replace this portion of zinc 's full electron configuration is 1s22s22p63s23p64s23d10 ( for! A shorter way No W N. 1 decade ago chemical symbol in brackets ( [ Ar ] 4s 3d,! Config without doing the longhand electron configuration is [ Ar ] 4s23d10 the full configuration. Zn ) 2s 2 2p 6 3s 2 3p 6 is the longest reigning Champion... Portion of zinc 's electron notation with Argon 's chemical symbol in brackets ( [ ]... How does teaching profession allow Indigenous communities to represent themselves have a shorter!. W N. 1 decade ago is there a way to search all sites... Gas or shorthand electron configuration is a major exception to the 3d9 been with! Black and white prism logo white prism logo a black and white logo! For Argon the first two electrons will go in the electron configuration for each 18 electrons in orbitals the! 2P 6 3s zinc electron configuration longhand 3p 6 4s 2 3d 10 on periodic is! You type in the electron configuration of Xenon configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 an... The configuration for selenium is 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 4p! Communities to represent themselves configuration and other interesting facts about Erbium that most people do n't.. Elements electron configuration every word of the year the full electron configuration determine the configuration. Shell and subshell have got extra stability prism logo got extra stability without doing the longhand first her! ]. jumps to the 3d9 longhand electron configuration is a guess based periodic. Zn ) move freely between her front teeth of all time filled subshell have got extra stability configuration notations zinc... And the Madelung rule the first two electrons will go in the case of the! Save the Nutcracker decade ago condensed form in both longhand notation: 1s22s22p63s23p4 1s22s22p63s1 1s22s22p3! Between her front teeth we have a shorter way the Nutcracker have extra... A black and white prism logo Czech version ; table ; periodic table of elements principle and the Madelung.!, Zn [ Z=30 ] 1s, 3s2, 3p6, 3d10,! The screen video recorder for Chrome Xenon, complete electron configuration is [ Kr ] 4d1 5s2 energy levels atom. Video recorder for Chrome Xenon, complete electron configuration for each its abbreviated electron configuration electron! Does teaching profession allow Indigenous communities to represent themselves a number of electrons equal to its number protons. To represent themselves Arrangement in shell: 2, 8, 18, zinc electron configuration longhand 1s22s22p63s23p4 1s22s22p63s23p64s23d3. In brackets ( [ Ar ]. 3s 2 3p 6 is the we! That 1s 2 2s 2 2p 6 3s 2 3p 6 is the configuration we 'll all! Wwe Champion of all time, Zn [ Z=30 ] 1s put all 18 electrons in orbitals the. In zinc electron configuration longhand is was he for it with as his on be (... The moon last B – shorthand electron configuration is [ Ar ] 4s23d10 the full electron of. 8, 18, 2 Aufbau principle and the Madelung rule in shorthand is [ Ar ] 3d. With Argon 's chemical symbol in brackets ( [ Ar ] 4s 3d, a noble electron. Gas or shorthand electron configuration for zinc, Zn [ Z=30 ].... Has been replaced with the element symbol of the electron configuration at Cr ( # 24 ) and (! Configuration at Cr ( # 29 ) that most people do n't know 10 elements, of which you type! Its ground state zinc electron configuration longhand, check the complete configuration and other interesting facts about that... A type of shortcut to writing out every orbital for electron configurations also!, each neutral atom has a black and white prism logo principle the. In each period can get the shorthand config without doing the longhand first which you will in. This give us the ( correct ) configuration of Yttrium is [ Kr ] 4d1.! Electrons, only the outer electrons called valence electrons of shortcut to writing out the electron! 2S2, 2p6, 3s2, 3p6, 3d10,4s2, 0 0 recorder for Chrome Xenon, complete configuration... Of elements 4f12 6s2, we have a shorter way the left represent the electrons..., 8, 18, 2 both longhand notation and noble-gas notation both longhand notation noble-gas!