Question
The lanthanide contraction is responsible for the fact that
- Zr and Y have about the same radius
- Zr and Nb have similar oxidation state atomic number
- Zr and Hf have about the same radius
- Zr and Zn have the same oxidation state
The correct answer is: Zr and Hf have about the same radius
Related Questions to study
Which of the following attacks glass
Which of the following attacks glass
A sodium cation has a different number of electrons from
A sodium cation has a different number of electrons from
Which has the smallest size
Which has the smallest size
Which one of the following indicates the correct order of atomic size
Which one of the following indicates the correct order of atomic size
On moving down a group of regular elements, both atomic and ionic radii increases with increasing
On moving down a group of regular elements, both atomic and ionic radii increases with increasing
The ionic radii of 
, 
, 
and 
follow the order
The ionic radii of , , and follow the order
Which one of the following species possesses maximum size
Which one of the following species possesses maximum size
Two parallel conducting plates, each of area A, are separated by a distance. Now, the left plate is given a positive charge Q. A positive charge q of mass m is released from a point near the left plate. Find the time taken by the charge to reach the right plate
Two parallel conducting plates, each of area A, are separated by a distance. Now, the left plate is given a positive charge Q. A positive charge q of mass m is released from a point near the left plate. Find the time taken by the charge to reach the right plate
The work required to put the four charges at the corners of a square of side a, as shown in figure, is
The work required to put the four charges at the corners of a square of side a, as shown in figure, is
Charges +q and –q are placed at points A and B respectively which are a distance 2L apart, C is the mid-point between A and B. The work done in moving a charge + Q along the semicircle CRD is
Charges +q and –q are placed at points A and B respectively which are a distance 2L apart, C is the mid-point between A and B. The work done in moving a charge + Q along the semicircle CRD is
A 10 μF capacitor and a 20μ F capacitor are connected in series across 200 V supply line. The charged capacitors are then disconnected from the line and reconnected with their positive plates together and negative plates together and no external voltage is applied. What is the potential difference across each capacitor?
A 10 μF capacitor and a 20μ F capacitor are connected in series across 200 V supply line. The charged capacitors are then disconnected from the line and reconnected with their positive plates together and negative plates together and no external voltage is applied. What is the potential difference across each capacitor?
An electron enters the space between the plates of a charged capacitor as shown. The charge density on the plate is σ Electric intensity in the space between the plates is E .A uniform magnetic field also exists in the space perpendicular to the direction of E The electron moves perpendicular to both E and B without any change in direction. The time taken by the electron to travel a distance I in the space is
An electron enters the space between the plates of a charged capacitor as shown. The charge density on the plate is σ Electric intensity in the space between the plates is E .A uniform magnetic field also exists in the space perpendicular to the direction of E The electron moves perpendicular to both E and B without any change in direction. The time taken by the electron to travel a distance I in the space is
