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O - Oxygen Z=8

Electron configuration: 1s22s22p4

Solar Abundance: 8.87 ±0.07 (Grevesse et al. 1996)

Ions

ION Spectrum Configuration I.P. (eV)
O OI

1s22s22p4

  
O+ OII

1s22s22p3

  
O2+ OIII

1s22s22p2

  
O3+ OIV

1s22s22p

  
O4+ OV

1s22s2

  

O5+

 OVI

1s22s

  

O6+

 OVII

1s2

  
O7+ OVIII

1s

  

References:

Grevesse N., Noels A., Sanyal A.J. 1996, ASP Conf. Series, 99,117-126