The size of isoelectronic species: F, Ne and Na+, is affected by :

1. Nuclear charge (Z)
2. Valence principal quantum number (n)
3. Electron-electron interaction in the outer orbitals
4. None of the above factors because their size is the same

Subtopic:  Atomic Size |
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The incorrect statement about ionization enthalpy is:

1. Ionization enthalpy increases for each successive electron.
2. Noble gases have the highest ionization enthalpy.
3. A big jump in ionization enthalpy indicates a stable configuration.
4. Ionization enthalpy of oxygen is higher than that of nitrogen.

Subtopic:  Ionization Energy (IE) |
 79%
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The ionic radii vary in :

(a) Inverse proportion to the effective nuclear charge.
(b) Inverse proportion to the square of effective nuclear charge.
(c) Direct proportion to the screening effect.
(d) Direct proportion to the square of screening effect.


Choose the correct option :

1. (a), (c)

2. (b), (c)

3. (c), (d)

4. (b), (d)

Subtopic:  Atomic Size |
 84%
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Match the following isoelectronic species in Column I and Column II: 

Column I Column II
i. F- a. Br-
ii. Ar b. Si2+
iii. Mg c. O2-
iv. Rb+ d. S2-
 
i ii iii iv
1. b c a d
2. c b a d
3. c d b a
4. b c d a
Subtopic:  Atomic Size |
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The correct order of ionization energy of W, X, Y and Z is-

1. W > X > Y > Z 2. W < X < Y > Z
3. W < X > Y< Z 4. W > X > Y< Z
Subtopic:  Ionization Energy (IE) |
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Consider the following curves:

X represents group with highest atomic radius. The element that belongs to Y group can be : 

1. Na 2. Mg
3. Br 4. Si
Subtopic:  Atomic Size |
 53%
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In the following graph of variation of ionization energy with atomic number, X, Y, and Z represent elements.

  

The group number of X, Y, and Z elements is:

1. 1st group 2. 15th group
3. 17th group 4. 18th group

Subtopic:  Ionization Energy (IE) |
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The graph between ionization energy and atomic number for the first group elements is shown below:

The element represented by Y in the graph above is:

1. Cs 

2. Rb

3. Ca

4.  K

Subtopic:  Ionization Energy (IE) |
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Abnormally high ionization enthalpy of B as depicted in the graph below can be due to : 

1. Completely filled 2p subshell.

2. Completely filled 2s subshell.

3. Completely filled 3d subshell.

4. Completely filled 4f subshell.

Subtopic:  Ionization Energy (IE) |
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The correct graph depicting ionization energies for 2nd period elements is:

1.
2.
3.
4. None of the above
Subtopic:  Ionization Energy (IE) |
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