Whychromium has electronic configuration 4s1,3d5ad rather
than 4s2,3d4
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because in 4s1 ,3d5 it is more stable due to partially filled d orbital.
uditanand4209:
The IUD releases copper ions within the female reproductive tract that inhibit the movement or motility of sperm. As the motility of the sperm is suppressed, fertilization does not happen. Sperm movement is interfered with by Cu2+ ions. Thus, IUDs releasing copper act as an effective contraceptive measure
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