CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

How many 3d electrons does the manganese(II) ion,Mn2+, have?


Open in App
Solution

Configuration of Mn:

  • Mn:1s22s22p63s23p63d54s2
  • Mn has an atomic number equal to 25 which implies a neutral manganese atom must have 25 electrons surrounding its nucleus.
  • The 2 electrons that are lost when the Mg+2 cation is formed are coming from the 4s orbital.
  • This is because the 4s orbital is higher in energy than the 3d orbitals when filled.
  • Mn2+:1s22s22p63s23p63d5.

Hence, Mg+2 have five 3d electrons.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Atoms_tackle
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon