what-is-the-electron-configuration-exception-for-chromium-and-how-is-it-achieved

Question

What is the electron configuration exception for chromium, and how is it achieved?

Accepted Answer

Chromium promotes an electron from the 4s orbital to the 3d orbital, resulting in $$4s^{1}$$ $$3d^{5}.$$

Answer

Chromium does not promote any electrons, resulting in $$4s^{2}$$ $$3d^{4}.$$

Answer

Chromium promotes an electron from the 3d orbital to the 4s orbital, resulting in $$4s^{2}$$ $$3d^{4}.$$

Answer

Chromium promotes an electron from the 4p orbital to the 3d orbital, resulting in $$4s^{2}$$ $$3d^{5}.$$