MCQ
In a transition series, as the atomic number increases, paramagnetism
- Aincreases gradually
- Bdecreases gradually
- ✓first increases to a maximum and then decreases
- Dfirst decreases to a minimum and then increases
✓
Answer
Correct option: C.
first increases to a maximum and then decreases
c
For transition elements, with increase in atomic number electrons enter the empty d-orbitals. First they are singly occupied which increases paramagnetism until the point where all the d-orbitals are half-filled (point of maximum paramagnetism) and then they get paired which decreases paramagnetism. Hence, paramagnetism first increases till maximum then decreases.
For transition elements, with increase in atomic number electrons enter the empty d-orbitals. First they are singly occupied which increases paramagnetism until the point where all the d-orbitals are half-filled (point of maximum paramagnetism) and then they get paired which decreases paramagnetism. Hence, paramagnetism first increases till maximum then decreases.
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