Question

Q.4 (a) Explain the term – Lanthanoid Contraction
(b) Transition elements exhibit paramagnetic behavior, Explain
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Answer 1

Answer:

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Explanation:

a)Lanthanoid contraction, also called lanthanide contraction, in chemistry, the steady decrease in the size of the atoms and ions of the rare earth elements with increasing atomic number from lanthanum (atomic number 57) through lutetium (atomic number 71).

b)Transition metals show paramagnetic behaviour. Paramagnetism arises due to the presence of unpaired electrons with each electron having a magnetic moment associated with its spin angular momentum and orbital angular momentum. Therefore, the resulting paramagnetism is only because of the unpaired electron.

Answer 2

Answer:

a)Lanthanoid contraction, also called lanthanide contraction, in chemistry, the steady decrease in the size of the atoms and ions of the rare earth elements with increasing atomic number from lanthanum (atomic number 57) through lutetium (atomic number 71).

b)Transition metals show paramagnetic behaviour. Paramagnetism arises due to the presence of unpaired electrons with each electron having a magnetic moment associated with its spin angular momentum and orbital angular momentum. Therefore, the resulting paramagnetism is only because of the unpaired electron.

Explanation:

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