Atoms Test - 74...

An electron collides with a fixed hydrogen atom in its ground state. Hydrogen atom gets excited and the colliding electron loses all its kinetic energy. Consequently the hydrogen atom may emit a photon corresponding to the largest wavelength of the Balmer series. The main KE of colliding electron will be

An alpha particle collides elastically with a stationary nucleus and continues moving at an angle of $$60^0$$ with respect to the original direction of motion. The nucleus recoils at an angle of $$30^0$$ with respect to this direction. Mass number of the nucleus is  :

Choose the correct statement (s) for hydrogen and deuterium atoms considering motion of reaction

An electron jumps from the $$4^{th}$$ orbit to the $$2^{nd}$$ orbit of hydrogen atom $$(R=10^{5}\ Cm^{-1})$$. Frequency is in $$Hz$$ of emitted radiation will be

According to Bohr's theory of the hydrogen atom, the speed $$v_n$$ of the electron in a stationary orbit is related to the principal quantum number n as (C is a constant).

In a Geiger-Marsden experiment if the distance of closest approach is $$d$$ to the nucleus and an $$\alpha$$ particle of energy E then

The energy levels of a certain atom for 1st, 2nd and 3rd levels are E, 4E$$_{1\to3}$$ and 2E respectively. A photon of wavelength $$\lambda $$ is emitted for a transition $$3\rightarrow 1$$. What will be the wavelength of emissions for transition $$2\rightarrow 1$$:

Assuming Bohr's model for $$Li^ {++}$$ atom, the first excitation energy of ground state of $$Li^ {++}$$ atom is

In a hypothetical system a particle of mass m and charge -3 q is moving around a very heavy particle having charge q. Assuming Bohr's model to be true to this system, the orbital velocity of mass m when it is nearest to heavy particle is:

A hydrogen atoms emits green light when it changes from the n=4 energy level to n=2 level. which color of light would the atom emit when it changes from the n=5 level to n=2 level ?