The formula of the stable binary compounds that would be formed by 
an element having atomic number 71 and fluorine:

1. LuF6

2. LuF2

3. LuF3

4. LuF4
 

Subtopic:  Nature of Compound |
 64%
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The factor that does not affect the valence electron is: 

1. Azimuthal quantum number 2. Nuclear charge (Z)
3. Nuclear mass 4. Number of core electrons
Subtopic:  Electronic Configuration |
 62%
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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 |
 68%
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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) |
 77%
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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 |
 86%
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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) |
 66%
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Consider the following curve:

   
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 |
 51%
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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) |
 58%
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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) |
 85%
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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) |
 78%
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