$O^{2 -}$ , $F^{F -}$ , $N a^{+}$ and $M g^{2 +}$ are isoelectronic, the order of increasing size is

Question

$O^{2 -}$ , $F^{F -}$ , $N a^{+}$ and $M g^{2 +}$ are isoelectronic, the order of increasing size is

A. $F^{-} < N a^{+} g^{+ +} < O^{2 -}$

B. $F^{-} < O^{2 -} < N a^{+} < M g^{+ +}$

C. $M g^{+ +} < F^{-} < N a^{+} < O^{2 -}$

D. $M g^{+ +} < N a^{+} < F^{-} < O^{2 -}$

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Comment

Which of the following species have minimum size?

A. $B r^{-}$

B. $S^{- 2}$

C. $N e$

D. $K^{+}$

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Which of the following has minimum ionisation energy

A. Ca

B. In

C. Te

D. Rb

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Elements belonging to the same period are

A. Si, N, O

B. Li, Be, Mg

C. Sc. Ti. V

D. Cu, Zn, Cd

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The first atom with maximum number of d-electrons is with atomic number

A. 27

B. 46

C. 36

D. 29

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In the Mendeleef's periodic table properties of the elements are the periodic function of their

A. atomic weight

B. atomic number

C. atomic volume

D. none of these

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Which of the following has highest ionisation energy?

A. Be

B. Cl

C. Ba

D. N

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A metal may have atomic number

A. 85

B. 32

C. 38

D. 2

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Elements whose atoms have incompletely filled penultimate energy levels are known as

A. s-block elements

B. p-block elements

C. d-block elements

D. inert gases

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Modem Periodic Law was given by

A. Joule

B. Moseley

C. Klechkosky

D. Meyer

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With the increase in atomic number in a period of the periodic table

A. electron affinity decreases

B. metallic character decreases

C. ionisation energy decreases

D. atomic mass decreases

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Which of the following conform both cation and anion?

A. I

B. Cl

C. K

D. F

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The heaviest element is

A. Cs

B. Na

C. Hg

D. U

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Ionisation energy of potassium is $425 k J m o l^{- 1}$ . The minimum frequency of a photon that can effect the ionisation is

A. $96.5 \times 10^{15} s e c^{- 1}$

B. $1.065 \times 10^{14} s e c^{- 1}$

C. $1.065 \times 10^{12} s e c^{- 1}$

D. $1.065 \times 10^{15} s e c^{- 1}$

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Ionisation energy is the amount of energy required to remove

A. the most loosely bound electron from an isolated gaseous atom

B. an electron from an atom of an element

C. an electron from an isolated gaseous atom

D. an electron from covalently bonded atom in a molecule

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Which of the following has maximum ionisation energy?

A. Li

B. Ba

C. Cl

D. Be

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Which of the following has maximum electron affinity ?

A. Cl

B. Br

C. I

D. F

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Which of the following atoms is paramagnetic?

A. Zn

B. N

C. Ca

D. Sr

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Elements whose atoms have incompletely filled penultimate and anti-penultimate energy levels are known as

A. Inner Transition elements

B. Representative elements

C. Inert elements

D. Noble gases

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IV Period has.........elements.

A. 18

B. 36

C. 8

D. 9

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Lother Meyer plotted a graph of

A. Atomic volume versus atomic number

B. Atomic radii versus atomic weight

C. Atomic weight versus mass number

D. Atomic volume versus atomic weight

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The smallest ion amongst the following

A. $S i^{+ + + 1}$

B. $K^{+}$

C. $A t^{1 + 1}$

D. $M g^{+ 1}$

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The element with no definite place in the periodic table is

A. At

B. H

C. N

D. Pt

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3.Atomic number of an element X is 34, it belongs to

A. IV period, VIA group

B. IV period, IIA group

C. V period, III B group

D. IV period, VII A group

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In the periodic table on moving from left to right across a period, the metallic character of elements

A. increases

B. decreases

C. increases and decreases

D. remains the same

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Arrange the following set of atoms in the order of increasing atomic radius : F, Cl, C, O

A. F, Cl, O, C

B. C. O, F, Cl

C. O. C, F, Cl

D. F, O, C, Cl

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An atom of an element has electronic configuration $(A r) 4 s^{2} 3 d^{5}$ , the element belongs to block

A. s

B. p

C. f

D. d

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The lightest metal is

A. Li

B. Pb

C. Na

D. Al

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Which of the following is not an s-block element?

A. Ru

B. Be

C. Fr

D. Rb

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The differentiating electron enters in the penultimate energy level in the case of

A. s block ele.

B. p block ele.

C. d block ele.

D. f block ele.

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Second electron affinity of the elements is always

A. positive

B. negative

C. zero

D. more than first E.A.

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Accepted Answer

D.

M g^{+ +} < N a^{+} < F^{-} < O^{2 -}

$O^{2 -}$ , $F^{F -}$ , $N a^{+}$ and $M g^{2 +}$ are isoelectronic, the order of increasing size is

Correct Answer :

Show all Periodic Classification of Elements MCQ

Related Questions

Which of the following species have minimum size?

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In the Mendeleef's periodic table properties of the elements are the periodic function of their

Which of the following has highest ionisation energy?

A metal may have atomic number

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Correct Answer :

Show all Periodic Classification of Elements MCQ

Related Questions

Which of the following species have minimum size?

Which of the following has minimum ionisation energy

Elements belonging to the same period are

The first atom with maximum number of d-electrons is with atomic number

In the Mendeleef's periodic table properties of the elements are the periodic function of their

Which of the following has highest ionisation energy?

A metal may have atomic number

Elements whose atoms have incompletely filled penultimate energy levels are known as

Modem Periodic Law was given by

With the increase in atomic number in a period of the periodic table

Which of the following conform both cation and anion?

The heaviest element is

Ionisation energy of potassium is 425 kJ mol-1. The minimum frequency of a photon that can effect the ionisation is

Ionisation energy is the amount of energy required to remove

Which of the following has maximum ionisation energy?

Which of the following has maximum electron affinity ?

Which of the following atoms is paramagnetic?

Elements whose atoms have incompletely filled penultimate and anti-penultimate energy levels are known as

IV Period has.........elements.

Lother Meyer plotted a graph of

The smallest ion amongst the following

The element with no definite place in the periodic table is

3.Atomic number of an element X is 34, it belongs to

In the periodic table on moving from left to right across a period, the metallic character of elements

Arrange the following set of atoms in the order of increasing atomic radius : F, Cl, C, O

An atom of an element has electronic configuration (Ar) 4s23d5, the element belongs to block

The lightest metal is

Which of the following is not an s-block element?

The differentiating electron enters in the penultimate energy level in the case of

Second electron affinity of the elements is always

Also checkout

$O^{2 -}$ , $F^{F -}$ , $N a^{+}$ and $M g^{2 +}$ are isoelectronic, the order of increasing size is

Ionisation energy of potassium is $425 k J m o l^{- 1}$ . The minimum frequency of a photon that can effect the ionisation is

An atom of an element has electronic configuration $(A r) 4 s^{2} 3 d^{5}$ , the element belongs to block