Question

1. (a) Nobel gases have comparatively large atomic size why?
(b) Sea divers use a mixture of He and O2 in place of N2 and 02 for
respiration in deep sea.why?​

Answer 1

Answer:

a) noble gases have completely filled orbits . due to maximum number of electrons , e- - e- repulsion exists between them.

So charge cloud expansion exists between them.So, comparatively large sizes.

(b) N2 gas is not utilised for metabolic purposes