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- Engineering
- Can someone explain Identify the incorrect statement among the following:
- #d - and f - BLOCK ELEMENTS
- #Engineering
- #Joint Entrance Examination Main
- #Chemistry
- #All India Pre Medical Test
Identify the incorrect statement among the following:
- Option 1)
orbitals are equally shielded.
- Option 2)
- Block elements show irregular and erratic chemical properties among themselves.
- Option 3)
have partially filled
- Option 4)
The chemistry of various lanthanoids is very similar.
Answers (1)
As we learned
Atomic Radii -
Atomic radii decrease with increases in atomic number from left to right but the unit of increment is very low.
- wherein
Ionic Radii -
As atomic radii, ionic radii also decrease with increase in atomic number.In +3 oxidation state.
-
5f orbital has poor shielding effect then 5f. 5f has comparetively larger size than 4f orbitals, 5f orbitals are more diffused in shape and cannot shield the nuclear charge effectiively.
Option 1)
orbitals are equally shielded.
Option 2)
- Block elements show irregular and erratic chemical properties among themselves.
Option 3)
have partially filled
-orbitals and no other partially filled orbitals.
Option 4)
The chemistry of various lanthanoids is very similar.
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