Neptunium Electron Configuration:7 Easy Steps on How to Write

Neptunium is an actinide having 7 valence electrons. Let us explore its electronic configuration.

The electronic configuration of Np is [Rn] 5f⁴ 6d¹ 7s². Np has a half-life of 2.144 million years and is majorly synthesized artificially. Edwin McMillan and Philip Abelson were the discoverers of Np.

Np has 93 electrons systematically distributed into various shells. In this article, we will be discussing about the electronic configuration of Np.

How to write neptunium electron configuration

The electronic configuration of Np is [Rn] 5f⁴ 6d¹ 7s², with atomic number 93 which is written according to Aufbau’s principle as follows.

• S orbital can at max have 2 electrons
• P orbital can accommodate 6 electrons    
• D orbital can have 10 electrons, and
• F orbital can accommodate 14 electrons.

Neptunium electron configuration diagram

The electronic configuration of Np is [Rn] 5f⁴ 6d¹ 7s², which can be drawn as follows-

Neptunium electron configuration notation

The electron configuration notation of Np is written as follows-

• [Rn] 5f⁴6d¹7s² as per noble gas Radon.

• 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰4f¹⁴5s²5p⁶5d¹⁰5f⁴6s²6p⁶6d¹7s² in terms of orbitals.

Neptunium unabbreviated electron configuration

The unabbreviated electron configuration of Np is 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰4f¹⁴5s²5p⁶5d¹⁰5f⁴6s²6p⁶6d¹7s²

Ground state neptunium electron configuration

The ground state electronic configuration of Np is 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰4f¹⁴5s²5p⁶5d¹⁰5f⁴6s²6p⁶6d¹7s²

Excited state of neptunium electron configuration

The excited state of Np electron configuration is 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰4f¹⁴5s²5p⁶5d¹⁰5f⁴6s²6p⁶6d⁰7s²7p¹

Ground state neptunium orbital diagram

The ground state electronic configuration of Np is 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰4f¹⁴5s²5p⁶5d¹⁰5f⁴6s²6p⁶6d¹7s² which is drawn as follows-

Conclusion

Np has 24 available isotopes out of which ²³⁷Np is the most stable isotope. Np is named after Neptune (the planet) and shows radioactivity. Np is an amphoteric oxide and shows +2,+3,+4,+5,+6, and +7 oxidation states.

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