helium has ns^2 configuration and hence belongs to 18th group. why aren't the elements in group 2 considered as nobel?

Asked by Saurabh Rai | 20th Nov, 2010, 12:00: AM

Expert Answer:

Dear Student
 
Group 2 elements have also filled s orbital, but they have empty p-orbitals. while in Group 18 the elements have both s and p-filled orbitals.
In terms of elements Noble means non-reactive. Group 18 elements were found non-reactive so they were named as Noble. Group 2 elements are reactive metals, so we cant call them noble.
 
We hope that clarifies your query.
With regards,
Team
Topperlearning

Answered by  | 21st Nov, 2010, 09:07: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.