The ratio of density of nuciel of `O^(16)` and `Ca^(40)` is :

The ratio of mass densities of nuclei of .^40Ca and .^16O is close to:

The ratio of mass densities of nuclei of ""^( 40 ) C a and ""^( 16 ) O is close to :

If the densities of methane and oxygen are in the ratio 1 : 2 , the ratio of rate diffusion of O_(2) and CH_(4) is respectively

The ratio of nucleons in O^16 and O^18 is:

Ratio of nuclear radii of ""^(135)Cs "to" ""^(40)Ca is

Ratio of nuclear radii of ""^(135)Cs "to" ""^(40)Ca is

Vapour densities of O_(2) and CH_(4) are 32 and 16 respectivley. The ratio of rate of diffusion of CH_(4) to that of O_(2) is

Obtain approximately the ratio of the radii of iron ._(26)Fe^(56) and calcium ._(20)Ca^(40) . What is the approximate ratio of their nuclear mass densities?

An isobar of ._(20)Ca^(40) is