Problem: Which ion with a +1 charge has the electron configuration 1s22s22p63s23p63d104s24p6? Which ion with a –2 charge has this configuration?

FREE Expert Solution

# of electrons = atomic number of neutral element 

  • cation → loses electrons (same number of e- to its charge)
  • anion → gains electrons (same number of eto its charge)


Electron configuration: 1s22s22p63s23p63d104s24p6

  • # of electrons = 36


Atomic number of Neutral element forming ion with charge -2 = 36 - 2 = 34 → Se

  • gained 2e- (subtract 2e- to get neutral element)
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Problem Details

Which ion with a +1 charge has the electron configuration 1s22s22p63s23p63d104s24p6? Which ion with a –2 charge has this configuration?

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