Structure of Atom Test - 7

The shortest wavelength of He atom in Balmer series is x, then longest wavelength in the Paschene series of Li⁺² is :

An electron in a hydrogen atom in its ground state absrobs energy equal to the ionisation energy of Li⁺². The wavelength of the emitted electron is

An electron, a proton and an alpha particle have kinetic energies of 16E, 4E and E respectively. What is the qualitative order of their de-Broglie wavelengths?

Given ΔH for the process Li(g) → Li⁺³(g) + 3e^- is 19800 kJ/mole & IE₁ for Li is 520 then IE₂ & IE₃ of Li⁺ are respectively (approx, value) :

The ratio of difference in wavelengths of 1st and 2nd lines of Lyman series in H-like atom to difference in wavelength for 2nd and 3rd lines of same series is :

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

The ratio of wave length of photon corresponding to the α-line of lyman series in H-atom and β-line of Baimer series in He⁺ is

Three energy levels P, Q, R of a certain atom are such that E_P < E_Q < E_R. If λ₁, λ₂, and λ₃, are the wave length of radiation corresponding to transition R → Q : Q → P and R → P respectively. The correct relationship between λ₁, λ₂ and λ₃ is

The Value of (n₂ + n₁) and for He⁺ ion in atomic spectrum are 4 and 8 respectively. The wavelength of emitted photon when electron jump from n₂ to n₁ is

Number of possible spectral lines which may be emitted in bracket series in H atom if electrons present 9^th excited level returns to ground level, are