Lanthanum is grouped with $f -$ block elements because:

it has partially filled

f -

orbitals

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it is just before

C e

in the periodic table

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it has both partially filled

f

and

d -

orbitals

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the properties of Lanthanum are very similar to the elements of

4

f block

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Solution

The correct option is A it has partially filled $f -$ orbitals
(A) It has partially filled f-orbitals. because, f orbitals of electron shell are filled with "n - 2". and deu to electronic configuration.

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Similar questions

Fill in the following blanks with suitable words :

(a) The basis for the modern periodic table is ……………

(b) The horizontal rows in a periodic table are called ……………

(d) Group 17 elements are known as ……………

(e) Group 18 elements are called ……………

(f) According to Newland’s classification of elements, the properties of sulphur are similar to those of oxygen because sulphur is the …………… element starting from oxygen.

The correct statement (s) from the following is/are:

i) All the d and f-block elements are metals.

ii) All d and f-block elements form coloured ions.

iii) All d and f-block elements are paramagnetic.

Q. The property seen in f-block elements is:

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Lanthanum is grouped with f−block elements because:

The correct option is A it has partially filled f−orbitals(A) It has partially filled f-orbitals. because, f orbitals of electron shell are filled with "n - 2". and deu to electronic configuration.

Lanthanum is grouped with $f -$ block elements because:

The correct option is A it has partially filled $f -$ orbitals
(A) It has partially filled f-orbitals. because, f orbitals of electron shell are filled with "n - 2". and deu to electronic configuration.