Home
Class 12
CHEMISTRY
Two hydrogen atom collide head on and ...

Two hydrogen atom collide head on and end up with zero kinetic energy .Each atom then emit a photon of wavelength `121.6 nm` .Which transition leads to the wavelength ?

Text Solution

Verified by Experts

Wavelength is emitted in UV region and thus `n_(1)=1`
For H atom `=1/(lamda)=R_(H)[1/(1^(2))=1/(n^(2))]`
`:.1/(121.6xx10^(-9))=1.097xx10^(7)[1/(1^(2))-1/(n^(2))]`
`:.n=2`
Also the energy released is due to collision and all the kinetic energy is released inform of photon.
`:.1/2mv^(2)=(hc)/(lamda)`
`:.1/2xx1.67xx10^(-27)xxv^(2)=(6.625xx10^(-34)xx3xx10^(8))/(121.6xx10^(-9))`
`:.v=4.43xx10^(-4)` m/sec
Promotional Banner

Similar Questions

Explore conceptually related problems

Two hydrogen atoms undergo head on collision and end up with zero kinetic energy. Each particle then emits a photon of wavelength 1028 Å . Which transition leads to this wavelength ? Calculate the velocity of hydrogen atom before collision ( m_(H) =1.67 xx 10^(-27) kg)

Energy of an emitted photon with wavelength 620 nm is :

What will be the kinetic energy and total energy of an electron in H atom if the atom emit a photon of wavelength 4860 Å ?

A hydrogen atom emits ultraviolet of wavelength 102.5 nm what are the quantum number of the state involved in the transition?

(a) An atom initally in an energy level with E = - 6.52 eV absorbs a photon that has wavelength 860 nm. What is the internal energy of the atom after it absorbs the photon? (b) An atom initially in anergy level with E =-2.68 ev emits a photon that has wavelength 420 nm. What is the internal energy of the atom after it emits the photon?

If a hydrogen atom at rest, emits a photon of wavelength lambda , the recoil speed of the atom of mass m is given by :

A hydrogen like atom in ground st6ate abserbs n photon having the same energy and its emit exacity n photon when electron transition tekes placed .Then the energy of the absorbed photon may be

The energy levels of an atom are as shown in figure . Which one of those transition will result in the emission of a photon of wavelength 275 nm ?

in cases of hydrogen atom, whenever a photon is emitted in the Balmer series, (a)there is a probability emitting another photon in the Lyman series (b) there is a probability of emitting another photon of wavelength 1213 Å (c ) the wavelength of radiaton emitted in Lyman series is always shorter then the wavelength emitted in the Balmer series (d) All of the above.

(a) A gas of hydrogen atoms is their ground state is bombarded by electrons with kinetic energy 12.5 ev. What emitted wavelengths would you expect to see? (b) What if the electrons were replaced by photons of same anergy?.