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The lanthanide contraction is responsible for the fact that

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Important Questions on The d- and f-Block Elements

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

The correct order of ionic size of

N^{3 -}, {Na}^{+}, F^{-}, {Mg}^{2 +}

and

O^{2 -}

is :

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

Which of the following orders of ionic radii is correctly represented?

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Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

The correct order of the ionic radii of

O^{2 -}, N^{3 -}, F^{-}, {Mg}^{2 +}, {Na}^{+}

and

{Al}^{3 +}

is :

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

The correct order of atomic radii is:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

Among the element Li, N, C and Be, one with the largest atomic radius is

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

What is the correct order of atomic radii of the following atoms?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

The ionic radii of

O^{2 -}, F^{-}, {Na}^{+}

and

{Mg}^{2 +}

are in the order:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

The correct order of energy of

2 s

-orbitals in

H

Li

Na

and

K

, is

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

Which one of the following has largest ionic radius ?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

The size of the iso-electronic species

C l^{-}

, Ar and

C a^{2 +}

is affected by:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

Covalent bond length of a chlorine molecule is

1.98 \overset{o}{A}

. Covalent radius (in

\overset{o}{A}

) of chlorine atom is _________

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

The species

A r, K^{+}

and

C a^{2 +}

contain the same number of electrons. In which order do their radii increase?

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

Among the isoelectronic ions

(O^{2 -}, N^{3 -}, {Mg}^{2 +}, {Na}^{+}),

the ions with the least and the highest ionic radius are, respectively

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

The effective nuclear charge for an electron in

n = 2

shell in a fluorine atom will be, (calculated according to Slater's rules):

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

In the elements of the second period of the modern periodic table, the decrease in atomic radius

(pm)

is maximum with respect to

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

Which of the following is the correct order of radius?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

The ionic radii of

{Na}^{+}, F^{-}, O^{2 -}, N^{3 -}

follow the order

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

In comparison to boron, beryllium has:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

The effective nuclear charge of an element with three valence electrons is

2.60

. What is the atomic number of the element?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of Lanthanoids

The ionic radii

(in Å)

N^{3 -}, O^{2 -}

and

F^{-}

are respectively:

The lanthanide contraction is responsible for the fact that

Important Questions on The d- and f-Block Elements

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