QUESTIONS

Hydrogen atom has only one electron but its emission spectrum has many lines. Explain with reason.

The electron in an hydrogen atom is in the third excited state ($n=4$ level). What is the maximum number of photons that may be emitted in passing of the electron to the ground state? What is minimum number?

If hydrogen atoms are excited to the $4$th energy-level, how many different wavelengths are possible for the emitted radiation?

The energy of hydrogen atom in its ground state is $-13.6eV$. The atom is given an energy of $13.6eV$. In which energy state will it reach? What will be wavelength of the absorbed photons in this process?

The wavelength of the first spectral line of sodium atom is $5896\stackrel{0}{A}$. What is the first excitation potential of the sodium atom?

The first excitation potential of mercury is $4.86V$. A mercury atom, after absorbing a photon, reaches its first excited state. Find the wavelength of the absorbed photon.

The first and second excitation potentials of hydrogen atom are respectively $10.2V \mathrm{and} 12.09V$. Draw, on this basis, the energy-level diagram of the atom and show all possible emission transitions in it and mark their corresponding wavelengths.

The ionization potential of hydrogen atom is $13.6V$. In the lowest energy-level, this atom is ionized by absorbing wavelength $800\stackrel{0}{A}$. What will be the kinetic energy of the released electron?