Electron Configurations and the Periodic Table

Electron Configurations and the Periodic Table - s, p, d...

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Electron Configurations and the Periodic Table The periodic table is structured so that elements with the same type of valence electron configuration are arranged in columns. The left-most columns include the alkali metals and the alkaline earth metals . In these elements the valence s orbitals are being filled On the right hand side, the right-most block of six elements are those in which the valence p orbitals are being filled These two groups comprise the main-group elements In the middle is a block of ten columns that contain transition metals . These are elements in which d orbitals are being filled Below this group are two rows with 14 columns. These are commonly referred to the f-block metals . In these columns the f orbitals are being filled Important facts to remember: 1. 2, 6, 10 and 14 are the number of electrons that can fill the
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Unformatted text preview: s, p, d and f subshells (the l =0,1,2,3 azimuthal quantum number) 2. The 1 s subshell is the first s subshell, the 2 p is the first p subshell (n=2, l =1, 3 d is the first d subshell, and the 4 f is the first f subshell What is the electron configuration for the element Niobium? (41) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 3 Niobium is actually: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 1 4d 4 The reason is that the 5s and 4d energy levels are quite close and certain electronic arrangements can result in the levels being slightly different than expected. What is the electron configuration of the element Nickel? (28) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 8 What is the electron configuration for Nickel in terms of the nearest noble gas? [Ar] 4s 2 3d 8 How would the last valence orbital be filled?...
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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Electron Configurations and the Periodic Table - s, p, d...

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