wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Elements A, B and C belong to the same period in the long form of the periodic table. The nature of the oxides of A, B and C is amphoteric, basic and acidic respectively. The correct order of the atomic numbers of these elements is :

A
C>B>A
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
C>A>B
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
A>B>C
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
B>A>C
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B C>A>B
Acidic oxides are formed by those metal cations which have higher polarizing power due to higher effective nuclear charge, and metal cations with the lesser polarizing power are amphoteric and basic oxides are formed by the cation which have least polarizing power.

Now, as the polarizing power is directly proportional to the effective nuclear charge, and given that A, B and C are belonging to the same period, so now as we know, left to right the effective nuclear charge increases due to decrease in size, so polarizing power increases left to right ( with increase in atomic number) so if C is acidic, it has highest atomic number.

A is amphoteric, so it has a lesser atomic number than the C and B is basic, so it has the least atomic number.

Hence, the order is as follows :

C > A > B

Hence the correct option is B.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Higher Elements, Oxidation State
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon