Explain why atomic radius of Ga is less ...

Explain why atomic radius of Ga is less than that of Al.

Text Solution

Verified by Experts

In Gallium penultimate shell contains 10-d electrons. Due to this 10-d electrons shielding effect becomes poor on outer most electrons. So nuclear charge increased in Gallium. Hence atomic radius of Ga is lessthan that of .Al..

Topper's Solved these Questions

THE P-BLOCK ELEMENTS GROUP-13
VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Short Answer Questions|27 Videos
THE P-BLOCK ELEMENTS GROUP-13
VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Long Answer Questions|3 Videos
THE P-BLOCK ELEMENTS GROUP-13
VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Important Questions|39 Videos
STOICHIOMETRY
VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Important Question |39 Videos
THE P-BLOCK ELEMENTS GROUP-14
VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise LONG ANSWER QUESTIONS|4 Videos

Identify the correct statements from the following (i) The atomic radius of Al is lower than the atomic radius of Ga. (ii) Boron exists in many allotropic forms. (iii) The melting point of Ga is lowest among the group 13 elements.

`i,ii,iii`

ii, iii

`I,ii`

`I,iii`

(A) : Increase in the atomic radius from B to Al is more than that of consecutive elements of the same group (R) : Electrons in penultimate shell have greater screening effect

Both A and R are correct. R is the correct explanation of A.

Both A and R are correct. R is not the correct explanation of A.

A is true, but R is false

A is falsc, but R is true

(A) : Mg^(2+) and Al^(3+) are isolectronic but the magnitude of ionic radius of Al^(3+) is less than that in Mg^(2+) . (R ) : The effective nuclear charge on the outermost electrons in Al^(3+) is greater than that in Mg^(2+) .

Both A and R are correct. R is the correct explanation of A.

Both A and R are correct, R is not the correct explanation of A.

A is true and R is false

A is false , but R true