The actinoid elements belong to the second inner transition series. It encompasses elements from Actinium ( Z = 89 ) to Lawrencium Z = 103 . The actinoid series derives its name from the first element in the series, actinium. They all are radioactive in nature.

EASY

Earn 100

The electronic configuration of Einsteinium is :
(Given atomic number of Einsteinium = 99)

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Important Questions on The d- and f-Block Elements

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

The number of

f

electrons in the ground state electronic configuration of

Np (Z = 93)

is ______ .(Integer answer)

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

The number of unpaired electrons in the uranium

({}_{92}U)

atom is

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Which among the following actinoids does not have stable electronic configuration

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Which actinide isotopes are available in tonnes?

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

What are actinoids?

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Which of the following is not an actinoid?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

An element of 5f-series but has no electrons filled in 5f-sub shell

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Which actinide isotopes are available in gram quantities?

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Write down the electronic configuration of

{Th}^{4 +}

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Transuranic elements begins with

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

The observed electronic configuration of Protactinium (Atomic number $= 91$ ) is_______. $[Rn] 5 f^{x} 6 d^{y} 7 s^{z}$
The value of $(x + y + z)$ is _______.

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Explain the position of actinoid.

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Write the electronic configurations of the elements with the atomic numbers

61, 91, 101 and 109

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Explain why

{Gd}^{+ 3}

is colourless.

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

The electronic configuration of actinoids cannot be assigned with degree of certainty because of

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Introduction of Actinoids

Which of the following actinoids does not contain any electron in