[salonimodi2007]

which of the following electron transition will require the largest amount of energy in a hydrogen atom and how?
1)from n=1 to n=2
2)from n=2 to n=3
3)from n=infinity to n=1
4)from n=3 to n=5

[salonimodi2007]

The energy required to excite an electron of hydrogen atom from first orbit to 2nd orbit is and how?
1)3/4 of its ionisation energy
2)1/2 " " " " " " " " "
3)1/4 "
3)1/4 " " " " " " " "
4)none

[salonimodi2007]

A photon of energy 12.75eV is completely absorbed by a hydrogen atom initially in ground state.the principal quantum number of the excited state is and how?
1)1
2)3
3)4
4)infinite

[salonimodi2007]

as per bohr model,the minimum energy (in eV) required to excite the electron from the ground state of doubly ionised lithium(z=3) is and how?
1)1.51eV
2)13.6eV
3)91.8eV
4)122.4eV

[salonimodi2007]

as per bohr model,the minimum energy (in eV) required to excite the electron from the ground state of doubly ionised lithium(z=3) is and how?
1)1.51eV
2)13.6eV
3)91.8eV
4)122.4eV

[salonimodi2007]

The angular momentum of electron in an excited hydrogen atom is 2h/pie,the kinetic energy will be and how?
1) 13.6eV
2) 3.4eV
3) 0.85eV
4) 0.54eV