List of top Chemistry Questions on The Actinoids

Identify the series of elements so that all the elements in it are radioactive in nature.
Identify the highest oxidation state exhibited by plutonium (\(Z=94\)).

Assertion (A) : Actinoids show irregularities in their electronic configurations.

Reason (R) : Due to varying stabilities of \( f^0 \), \( f^7 \) and \( f^{14} \) occupancies of the 5f orbitals.

Which actinoid from following has smallest ionic size in \(+3\) state?
What is the atomic number of first post actinoid element ?
Actinoids show larger number of oxidation states :
Actinoids show larger number of oxidation states :
Assertion (A): Actinoids show irregularities in their electronic configurations.
Reason (R): In actinoids 5f, 6d and 7s orbitals are of comparable energies.
Americium belongs to
The element Americium Belongs to
The common stable oxidation states of Eu and Gd are respectively

Identify the element so that the last electron enters in ( \(n-2\) )f sub shell.

Identify inner transition element from following.

Assertion (A) : Actinoids show wide range of oxidation states.
Reason (R) : This is due to comparable energies of 5f, 6d and 7s orbitals.
Which actinoid from following in its +3 state has largest size?
Which actinoid from following in its +3 state has largest size?
Larger number of oxidation states are exhibited by the actinoids than those of lanthanoids. The reason is:
Which actinoid from following in its +3 state has largest size?
Which of the following pair of actinoids exhibit maximum oxidation state of \(+7?\)

The incorrect statement among the following is

Which one of the following actinoid has no electron in 6d orbital?
The reason for greater range of oxidation states in actinoids is attributed to
Which of the following exhibits only +3 oxidation state?