Write the electron configuration for the element titanium, TiTi. Express your answer in order of increasing orbital energy as a string without blank space between orbitals. For example, the electron configuration of LiLi could be entered as 1s^22s^1 or [He]2s^1.

The electron configuration of Ti is

  or  

The electron configuration of an element is the distribution of electrons in atomic orbitals.

According to Aufbau's principle, the orbitals with lower energies are filled before the orbitals with higher energies.

We can know this order, using the diagonal rule (attached image).

The maximum number of electrons in each sublevel is:

Considering all these facts, and that Titanium has 22 electrons, the electron configuration of Ti is:

Since is the electron configuration of Argon, this can also be written as:

The electron configuration of Ti is

  or  

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1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d² or [Ar] 3d² 4s²

Explanation:

Electron configuration can basically be referred to as the location of electron; how the electrons are arranged in the orbitals of the atoms.

Following Aufbau principle, electrons are arranged in the following order of orbitals.

1s 2s 2p 3s 3p 4s 3d and so on.

The s can hold a maximum of 2 electrons, p can hold a maximum of 6 electrons and d can hold a maximum of 10 electrons.

Titanium has an atomic number of 22. So the arrangement is given as;

Ti = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d²

The short hand notation is given as;

[Ar] 3d² 4s²

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