Atomic and Ionic Sizes of Lanthanides
Trending Questions
Q. Arrange Ce+3, La+3, Pm+3 and Yb+3 in increasing order of their ionic radii
Q.
What is the atomic radius?
Q. Cations are formed by .............. (loss/ gain) of electrons and anions are formed by ................. (loss/ gain) of electrons.
Q. Ionic radii gradually increases from Sc+2 to Cu+2 in 3d series – True or False?
- True
- False
Q. What is hybridization
Q.
chemically inert elements have____outermost cells
Q.
Choose incorrect option:-
1. Transition elements exhibit higher enthalpies of atomization.
2. Zinc is a transition element
3. Melting and boiling points increases steadily from Sc to Cu.
- 1 & 2
- 2&3
- 1, 2 & 3
- 3 only.
Q. Reason of lanthanoid contraction is
- Neglibible screening effect of ‘f’ - orbitals
- Increasing nuclear charge
- Decreasing screening effect
- Decreasing nuclear charge
Q. Gradual decrease in atomic and ionic radii from Ce3+ to Lu3+ is called
- Actinide contraction
- Both (A) and (B)
- Lanthanide contraction
- None of these
Q. Which of the following statements is true with respect to 3d series?
- Atomic radii gradually decreases from Sc to Zn
- Most of these elements have very similar atomic radii. There is hardly any appreciable variation at all
- Atomic radii gradually decreases from Sc to Cr
- Atomic radii gradually increases from Sc to Cr
Q. The radius of an atomic nucleus is in the order of:
- 10−2 cm
- 10−12 cm
- 10−13 cm
- 10−15 cm