What is the electron configuration of chromium?

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Jules Bruno · Accepted Answer

You can determine the ground-state electron configuration of Chromium (Cr) by referring to the periodic table and locating the position of Cr in the periodic table.Ground-state means that the element is in its lowest energy form (not in excited state). Cr has no charge which means that no electrons are removed or added in the atom.[readmore]• You will see in the above illustration of the periodic table that Cr is in Period 4 and d block.• Before reaching Cr, you will pass through the atomic orbitals 1s, 2s, 2p, 3s, 3p, 4s, and 3d•In a neutral atom:Atomic number = # of protons = # of electronsCr: atomic number = 24 → 24 protons & 24 electrons• Distribute electrons in the atomic orbitals:Recall:s orbital → can hold a maximum of 2 electronsp orbitals → can hold maximum of 6 electronsd orbitals → can hold maximum of 10 electronsf orbitals → can hold maximum of 14 electrons• Fill up the orbitals with electrons:***Note: Transition metals cannot have a d4 configuration for the last entering electron. This is because there is greater stability in two half-filled s orbital and d orbital. Hence, 1 electron from 4s will move to 3d.Write the electron configuration from lowest energy level to the highest energy level:Cr: 1s2 2s2 2p6 3s2 3p6 4s1 3d5You can also write the electron configuration of Cr using the condensed electron configuration:• Shorten the electron configuration by including a noble gas [1s2 2s2 2p6 3s2 3p6 ] 4s1 3d5• The enclosed electron configuration is the electron configuration of Argon (Ar), the nearest noble gas to Cr.Write the condensed electron configurationCr: [Ar] 4s1 3d5The complete electron configuration of Cr is 1s2 2s2 2p6 3s2 3p6 4s1 3d5

Problem: What is the electron configuration of chromium?

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Problem: What is the electron configuration of chromium?

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