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प्रश्न
The incorrect statement among the following is:
विकल्प
d-block elements show irregular and erratic chemical properties.
La and Cu have partially filled d-orbitals and no other partially filled orbitals.
The chemistry of various lanthanoids is very similar
4f and 5f orbitals are equally shielded
MCQ
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उत्तर
4f and 5f orbitals are equally shielded.
Explanation:
The shielding of 5f-electrons is less effective than that of 4f-electrons.
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