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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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. A and R both are false.
 
Subtopic:  Atomic Size |
 88%
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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 |
 74%
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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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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 |
 80%
From NCERT
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