Radius ratio corresponding to first,second and third orbit in H-atom is `r_(1):r_(2):r_(3)` is
1:1:1
1:4:9
1:2:3
1:9:8

If the radius of first second third and thurth orbit of hydrogen atom are r_(1),r_(2),r_(3) and r_(4) respectively .Then their current increases order will be

First Bohr radius of an atom with Z=82 is r. radius its third orbit is

If r is the radius of first orbit, the radius of nth orbit of the H atom will be:

If r_(1) is the radius of first orbit of hydrogen atom, then the radii of second, third and fourth orbits in terms of r_(1) are

If radius of second stationary orbit (in Bohr's atom) is R then radius of third orbit will be :

If the radius of the first Bohr orbit of the H atom is r then for the Li^(2+) ion it will be:

In a certain electronic transition in the hydrogen atoms from an initial state (1) to a final state (2) , the difference in the orbit radius ((r_(1)-r_(2)) is 24 times the first Bohr radius. Identify the transition-

If radius of second stationary orbit (in Bohr's atom) is R. Then radius of third orbit will be :-

According to Bohr model , radius of the first orbit of hydrogen atom is r_1 then the radii of second , third and fouth orbitals in term of r_1 are

Assertion The radius of second orbit of hydrogen atom is 2.1Å Reason Radius of nth orbit of hydrogen atom r_(n)propn^(2)