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Iron's atomic number is 26. Thus it has 26 protons and 26 electrons. The electronic configuration for the first 26 electrons, and so therefore iron, is Fe 1s2 2s2 2p6 3s2 3p6 4s2 3d6.

The shorthand electron configuration is Fe [Ar] 4s2 3d6.

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What is the electron configuration of atomic number 26?

The electron configuration of atomic number 26 (iron) is 1s2 2s2 2p6 3s2 3p6 4s2 3d6.


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The ground state electron configuration for iron (Fe) is Ar 3d6 4s2.


What is the ground state electron configuration of iron (Fe)?

The ground state electron configuration of iron (Fe) is Ar 3d6 4s2.


What element has the ground-state electron configuration of Ar4s23d6?

The element with that electron configuration is Iron.


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The noble gas electron configuration of an iron 3 ion (Fe3+) is [Ar]3d^5. This means that the ion has lost three electrons, leaving behind a 3+ charge, and the remaining electrons are arranged based on the electron configuration of argon.


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Iron is in group 8, period 4 of the periodic table. Thus, its electron configuration is 1s2 2s2 2p6 3s2 3p6 3d6 4s2. Another way to write this is [Ar] 3d6 4s2 since the beginning of the electron configuration is the same as argon's.


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