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

The first ionisation potential of Na, Mg and Si are 496, 737, and 776 kJ mol1 respectively. The ionisation potential of Al could be:

A
760 kJ mol1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
575 kJ mol1
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
801 kJ mol1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
419 kJ mol1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 575 kJ mol1
Ionisation potential increases when we move from left to right in a period. But the ionisation enthalpy of Al is lower than that of Mg as the 3p1 electron of Al is easier to remove than to remove an electron from a fully-filled 3s-orbital of Mg.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon