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An isoelectronic species having larger size than ${C l}^{-}$ is $S^{X -}$ , the value of $X$ is .

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Important Questions on Classification of Elements and Periodicity in Properties

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

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

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

Which one of the following has largest ionic radius ?

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

In comparison to boron, beryllium has:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The correct order of ionic size of

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

and

O^{2 -}

is :

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

Identify the element that forms amphoteric oxide:

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The correct order of the ionic radii of

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

and

{Al}^{3 +}

is :

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The size of the iso-electronic species

C l^{-}

, Ar and

C a^{2 +}

is affected by:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

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>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The ionic radii

(in Å)

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

and

F^{-}

are respectively:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

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

2.60

. What is the atomic number of the element?

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The effective nuclear charge for an electron in

n = 2

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

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The correct order of atomic radii is:

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

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

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The ionic radii of

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

and

{Mg}^{2 +}

are in the order:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

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>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The correct order of energy of

2 s

-orbitals in

H

Li

Na

and

K

, is

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

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>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

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

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The first ionization enthalpies of

Be, B, N

and

O

follow the order

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

The species

A r, K^{+}

and

C a^{2 +}

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

An isoelectronic species having larger size than Cl- is SX-, the value of X is .

Important Questions on Classification of Elements and Periodicity in Properties

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An isoelectronic species having larger size than ${C l}^{-}$ is $S^{X -}$ , the value of $X$ is .