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Question #39895

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Stefan V. · Media Owl

Feb 26, 2015

Scandium, or $Sc$ $"Sc"$ , is located in group 3, period 4 of the periodic table and has an atomic number equal to 21.

This means that the electron configuration for a neutral $Sc$ $"Sc"$ atom must account for 21 electrons.

$Sc : 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{1}$ $"Sc": 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3d^(1)$

SInce argon is the last noble gas that comes scandium in the periodic table, the noble gas shorthand notation, the electron configuration for $Sc$ $"Sc"$ will be

$Sc : [Ar] 4 s^{2} 3 d^{1}$ $"Sc": ["Ar"] 4s^(2) 3d^(1)$

![http://imgarcade.com/1/scandium-electron-configuration/]( useruploads.socratic.org )

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