Embibe Experts Solutions for Chapter: Atoms, Exercise 1: Exercise

Use Bohr's postulate for permitted orbits to prove that the circumstances of the nth permitted orbit for the electron can contain exactly n wavelengths of the de Broglie wavelength associated with the electron in that orbit.

Explain Rutherford's scattering of $\alpha -$particles. What information did it convey about atomic structure.

Explain why in their experiment Geiger and Marsden used an evacuated enclosure.

Explain why in their experiment Geiger and Marsden used a beam of alpha particle that was very narrow.

Light of wavelength $5000\stackrel{0}{A}$ falls on a sensitive surface. If the surface has received ${10}^{-7}$ joule of energy, then what is the number of photons falling on the surface?

What is the longest wavelength photon that can ionize a hydrogen atom in its ground state? Specify the type of radiation.

In Bohr's theory of hydrogen atom, calculate the energy of the photon emitted during transition of the electron from the first excited state to the ground state. Write in which region the spectrum lies.

Discuss different atomic models and compare their merits and demerits.