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La (lanthanum) having atomic number 57 is a member of:
  • a)
    s-block elements
  • b)
    p-block elements
  • c)
    d-block elements
  • d)
    f-block elements
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
La (lanthanum) having atomic number 57 is a member of:a)s-block elemen...
The correct answer is c) d-block elements
Both lanthanum and actinium are d block elements only. Lanthanum is the first element of the 3rd transition series, and the 5d orbitals start getting filled from lanthanum. And so, it has the configuration [Xe]5d1 6s2. The 4f orbitals get filled from the next element (cerium) only.

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Most Upvoted Answer
La (lanthanum) having atomic number 57 is a member of:a)s-block elemen...
If you check the periodic table ,this La(lanthanum) is belong to f- block elements
Community Answer
La (lanthanum) having atomic number 57 is a member of:a)s-block elemen...
Check periodic table
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La (lanthanum) having atomic number 57 is a member of:a)s-block elementsb)p-block elementsc)d-block elementsd)f-block elementsCorrect answer is option 'D'. Can you explain this answer?
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