What element is represented by the electron configuration 1s²2s²2p⁶3s²3p⁶4s¹3d⁵? A) Mn B) Ca C) K D) Cr E) V

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The electron configuration given contains a total of 24 electrons, which places it in the range of elements with atomic number between 21 and 30. Among the choices, only Cr (chromium) has an electron configuration that matches the given configuration. The other elements have either too few or too many electrons.

What Element Is Represented by the Electron Configuration 1s22s22p63s23p64s13d5

What Element Is Represented by the Electron Configuration 1s²2s²2p⁶3s²3p⁶4s¹3d⁵