MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryCoordination compoundsPrevious Year Questions
The effective atomic number of Cr (atomic no. 24) in [Cr(NH3)6]Cl3 is [Manipal 2010]
A.35
B.27
C.33✓ Correct
D.36
Explanation
Effective atomic number = atomic number of the metal- number of electrons lost during the formation of the metal ion from its atom+ number of electrons donated by the ligands. The atomic number of chromium is 24. Effective atomic number = 24 – 3 + 12 = 33 COORDINATION COMPOUNDS 28
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