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Al has a smaller first ionization enthal...

Al has a smaller first ionization enthalpy than Mg. Consider the following statements`:`
I. It is easier to remove 3p electron than 3s electron .
II . 3p electron of Al is more shielded from the nucleus by the inner coreof electron than the 3s electrons of Mg
III. 3s electron hasmore penetration power than 3p electron
IV. Atomic radius of Al is more than Mg ( atomic number Al=13, Mg = 12 )
The correct statements are `:`

A

I, II and IV

B

I,II and III

C

II, III and IV

D

I, III and IV

Text Solution

Verified by Experts

(I) Electron from 3p can be removed more easily than from 3s, as nucleus shows less attraction towards 3p electrons than 3s electron.Hence Al has smaller first Ionization enthalpy.
(II) Shielding of 3p is more than 3s
(III) Order of penetration power `: s gt p gt d gt f `
(IV) Atomic Radius of Al is less than Mg
Hence, It is an incorrect option.
Correct option is (B ) , (I) , (II) and (III)
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