The general outer electronic configuration of s, p, d , and f-block elements respectively would be :

1. ns1-2, nd2np1-6, (n-1)d1-10np0-2, (n-2)f1-14(n-1)d0-10ns2
2. ns1-2, ns2np1-6, (n-1)f1-10ns0-2, (n-2)g1-14(n-1)d0-1ns2
3. ns1-2, ns2np1-6, (n-1)d1-10ns1-2, (n-2)f1-14(n-1)d0-1 ns2
4. np1-2, nd2np1-6, (n-1)d1-10ns0-2, (n-2)f1-14(n-1)d0-10ns2

Subtopic:  Electronic Configuration |
 76%
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The position of elements with an outer electronic configuration as (n-2) f7(n-1)d1ns2, n = 6 :

1. 6th period and 10th group.

2.  7th period and 3rd group.

3.  6th period and 3rd group.

4. 7th period and 9th group.

Subtopic:  Electronic Configuration |
 75%
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1st (H1) and 2nd  (H2) Ionization Enthalpies (in kJ mol–1) and the (egH) Electron Gain Enthalpy (in kJ mol–1) of a few elements are given below:

Elements ΔH1 ΔH2 ΔegH
I 520 7300 -60
II 419 3051 -48
III 1681 3374 -328
IV 1008 1846 -295
V 2372 5251 +48
VI 738 1451 -40

The most reactive metal is:
1. VI
2. III
3. I
4. II

Subtopic:  Ionization Energy (IE) |
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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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