Question:
Reason of lanthanoid contraction is:
Reason of lanthanoid contraction is:
Updated On: Apr 21, 2025
- Increasing nuclear charge
- Decreasing nuclear charge
- Decreasing screening effect
- Negligible screening effect of 'f' orbitals
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
The correct option (D): Negligible screening effect of 'f' orbitals.
Was this answer helpful?
0
0
Top Questions on Periodic Table
- Given below are two statements: Statement (I): According to the Law of Octaves, the elements were arranged in the increasing order of their atomic number.
Statement (II): Meyer observed a periodically repeated pattern upon plotting physical properties of certain elements against their respective atomic numbers. In the light of the above statements, choose the correct answer from the options given below:- JEE Main - 2025
- Chemistry
- Periodic Table
- Which of the following options represents the correct ionic radii in Å of N3-, O2-, and F- respectively?
- TS EAMCET - 2025
- Chemistry
- Periodic Table
Which of the following Statements are NOT true about the periodic table?
A. The properties of elements are a function of atomic weights.
B. The properties of elements are a function of atomic numbers.
C. Elements having similar outer electronic configuration are arranged in the same period.
D. An element's location reflects the quantum numbers of the last filled orbital.
E. The number of elements in a period is the same as the number of atomic orbitals available in the energy level that is being filled.- JEE Main - 2025
- Chemistry
- Periodic Table
- Radius of the first excited state of Helium ion is given as:
\(a_0\) = radius of first stationary state of hydrogen atom.- JEE Main - 2025
- Chemistry
- Periodic Table
Match List-I with List-II:
- JEE Main - 2025
- Chemistry
- Periodic Table
View More Questions
Questions Asked in NEET exam
- Given below are two statements :
Statement I : In the nephron, the descending limb of loop of Henle is impermeable to water and permeable to electrolytes.
Statement II : The proximal convoluted tubule is lined by simple columnar brush border epithelium and increases the surface area for reabsorption.
In the light of the above statements, choose the correct answer from the option given below :- NEET (UG) - 2024
- Nephrons
- \(^{290}_{82}X\stackrel{\alpha}{\rightarrow}Y\stackrel{e^+}{\rightarrow}Z\stackrel{\beta^-}{\rightarrow}P\stackrel{e^-}{\rightarrow}Q\)
In the nuclear emission stated above, the mass number and atomic number of the product Q respectively, are :- NEET (UG) - 2024
- Nuclear physics
- The property which is not of an electromagnetic wave travelling in free space is that :
- NEET (UG) - 2024
- Electromagnetic waves
- Bulliform cells are responsible for
- NEET (UG) - 2024
- Cell Theory
- As per ABO blood grouping system, the blood group of father is $B^+$ , mother is $A^+$ and child is $O^+$. Their respective genotype can be
A. $I^B i/I^A i/ii$
B. $I^B I^B /I^A I^A /ii$
C. $ I^A I^B /iI^A /I^B i$
D. $I^A i/I^B i/I^A i$
E. $iI^B /iI^A /I^A I^B$
Choose the most appropriate answer from the options given below :
View More Questions