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 |
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Assertion (A): Naand Al3+ are isoelectronic but the magnitude of ionic radius of Al3+ is less than that of Na+.
Reason (R): The magnitude of effective nuclear charge of the outer shell electrons in Al3+ is greater than that in Na+.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True and (R) is False.
4. Both (A) and (R) are False.
Subtopic:  Atomic Size |
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Assertion(A): The mobility of sodium ion is lower than that of potassium ion.
Reason(R): The ionic mobilities depend on the effective radius of the ion.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.
 
Subtopic:  Atomic Size |
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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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Match the correct atomic radius with the corresponding element.

Element

Atomic radius (pm)

A.

Be

i. 

74

B.

C

ii. 

85

C.

O

iii.

112

D.

B

iv. 

77

E.

N

v. 

66

Codes :

Options:  A   B   C   D   E 
1.   i  ii  iii  iv  v
2.  iii   iv  v   ii  i
3.  iv  ii  iii   i  v
4.  v  ii    i   iii   iv

Subtopic:  Atomic Size |
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