There are three elements A,B and C. Their atomic number are Z1,Z2 and Z3 respectively. If Z1 - Z2 = 2 and (Z1 + Z2)/2 = Z3 - 2 and the electronic configuration of element A is [Ar]3d6 4s2, then correc

Question

There are three elements A,B and C. Their atomic number are Z1,Z2 and Z3 respectively. If Z1 - Z2 = 2 and (Z1 + Z2)/2 = Z3 - 2 and the electronic configuration of element A is [Ar]3d6 4s2, then correct order of magnetic momentum is/are :

Prashant Kotian · Accepted Answer

Correct answer: A,B,C. Step 1: Analyze the bond dissociation energy of the halogen molecules. Step 2: Fluorine (F2) has abnormally low bond dissociation energy (~158.8 kJ/mol) because the small size of the fluorine atoms leads to severe lone pair-lone pair repulsions. Step 3: This low value is exceptionally close to the bond dissociation energy of Iodine (I2, ~151 kJ/mol), which has a weak bond primarily due to its very large atomic size. Therefore, F2 and I2 have almost identical bond dissociation energies.

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