If in Bohr's model, for unielectronic atom, time period of revolution is represented as `T_(n,z)` where `n` represents shell no. and `Z` represents atomic number then the value of `T_(1,2):T_(2,1)` , will be `:`

If in Bohr's model, for unielectronic atom, time period of revolution is represented as T_(nz) where n represents shell number and z represents atomic number then the value of T_(12):T_(21) will be

in bohr model of hydrogen atom, rhe ratio of period of revolution of an electron in n=2 and n=1 orbits is

In Bohr model of hyrogen atom, the ratio of periods of revolution of an electon in n = 2 and n = 1 orbit is

If in Bohr.s model, for uni electronic atom following symbols are used : r_(n, Z) rarr Radius of n^(th) orbit with atomic number z U_(n, Z) rarr Potential energy of e^(-) K_(n, Z) rarr Kinetic energy of e^(-) V_(n,Z) rarr Velocity of e^(-) T_(n, Z) rarr Time period of revolution

Each shell in an atom is usually represented by a number represented as:

In Bohr.s model of hydrogen atom, the ratio between the period of revolution of an electron in orbit n=1 to the period of the electron in the orbit n=2 is

The parametic representation (2+ t ^(2), 2t +1 ) represents

The parametic representation (2+ t ^(2), 2t +1 ) represents