How many times larger is a kg then an mg ?

How many times larger is the spacing between the energy levels corresponding to n=8 and n=7 than the spacing between the energy levels corresponding to n=2 and n=3 , for a hydrogen atom ?

How many times larger is the spacing between the energy levels with n=3 and n=4,then the spacing between the energy levels with n=8 and n=9 for a hydrogen like atom or ion?

How many times larger is the spacing between the energy levels with n=3 and n=4,then the spacing between the energy levels with n=8 and n=9 for a hydrogen like atom or ion?

How many times a Kg is larger than 1 mg?

How many times is a kg heavier than a mg?

How many times 5 is 15 ?

How many times larger than a hydrogen atom the sun is?