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Consider the radiation emitted by large nu,ber of singly charged positive ions of a certain element. The sample emit fifteen types of spectral line. One of which is same as the first line of lyman series. What is the binding energy in the hinhest energy state of this configuration ?

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The correct Answer is:
1.51
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Atomic hydrogen is excited to the nth energy level . The maximum number of spectral lines which it can emit while returning to ground state,is:

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Find the number of spectral lines in Paschen series emitted by atomic H, when electron is excited from ground state to 7th energy level returns back .

The ground state energy of hydrogen atom is -13.6eV. If an electron makes a transition form an energy level -0.85 eV to -3.4 eV, calculate the wavelength of spectral line emitted. To which series of hydrogen spectrum does this wavelength belongs?

The ground state energy of hydrogen atom is -13.6eV. If an electron makes a transition form an energy level -0.85 eV to -1.51 eV, calculate the wavelength of spectral line emitted. To which series of hydrogen spectrum does this wavelength belongs?

A sample of hydrogen gas in its ground state is irradiated with photons of 10.02 eV energies. The radiation from the above sample is used to irradiate two other sample of excited ionized He^(+) and excited ionized Li^(2+) , repectively. Both the ionized samples absorb the incident radiation. How many spectral lines are obtained in the spectra of He^(+) ion?

the only electron in the hydrogen atom resides under ordinary conditions in the first orbit. When energy is supplied the electron moves to higher energy orbit depending on the amount of energy absorbed. It emits energy. Lyman series is formed when the electron returns to the lowest orbit while Balmer series is formed when the electron returns to second. Similarly, Paschen, Breakett and Pfund series are formed when electron returns to the third, fourth and fifth orbits from higher energy orbits respectively (as shown in figure). Maximum number of different lines produced when electron jump from nth level to ground level is equal to (n(n-1))/(2). For example in the case of n=4, number of lines produced is 6.(4to3,4to2,4to1,3to2,3to1,2to1). When an electron returns from n_(2) "to"n_(1) state, the number of different lines in the spectrum will be equal to ((n_(2)-n_(1))(n_(2)-n_(1)+1))/(2) If the electron comes back from energy level having energy E_(2) to energy level having energy E_(1), then the difference may be expressed in terms of energy of photon as: E_(2)-E_(1)=DeltaE,lambda=(hc)/(DeltaE),DeltaE=hv(v-"frequency") Since h and c are constants DeltaE corresponds to definite energy: thus each transition from one energy level to another will produce a light of definite wavelength. This is actually observed as a line in the spectrum of hydrogen atom. Wave number of line is given by the formula: barv=RZ^(2)((1)/(n_(1)^(2))-(1)/(n_(2)^(2))) where R is a Rydberg constant (R=1.1xx10^(7)m^(-1)). (i) First line of a series : It is called line of longest wavelength of line of smallest energy'. (ii) Series limit or last line of a series : It is the line of shortest wavelength or line of highest energy. wave number of the first line of Paschen series in Be^(3+) ion is :

Radiation from hydrogen gas excited to first excited state is used for illuminating certain photoelectric plate . When the radiation from same unknown hydrogen-like gas excited to the same level is used to expose the same plate , it is found that the de Broglie wavelength of the fastest photoelectron has decreased 2.3 time gt It is given that the energy corresponding to the longest wavelength of the Lyman series of the known gas is 3 times the ionization energy of the hydrogen gas (13.6 eV) . Find the work function of photoelectric plate in eV . [Take (2.3)^(2) = 5.25]

State the Following statement as statements as TRUE and FALSE. a. The redius of nth Bohr is proporitional to n^(2) . b. The total energy of electron in the nth orbit is inversely proporitional to n^(2) . c. The time period revolution of electron in the nth orbit is directly proporitional to n^(2) . d. The kinetic energy of electron is double of its potential energy with a negative sign. e. Velocity of electron in an atom is independent of its mass. f. Only balmer series of hydrogen atom lines in the visible range. g. The angular momentum of an electron revolving in the first orbit of hydrogen is equal to that in first orbit of helium. h. The binding energy of decuterium atom is more than that of hydrogen atom. i Lyman series of hydrogen atom lines in the infrared region.

CENGAGE PHYSICS-ATOMS-QUESTION BANK
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  2. A photon of energy 12.09 eV is completely absorbed by a hydrogen atom ...

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  3. Consider the radiation emitted by large nu,ber of singly charged posit...

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  4. An electron collides with a dfixed hydrogen atom in its ground stat. H...

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  5. The ratio of frequencies of the first line of the Lyman series and the...

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  6. The electron in a hydrogen atom makes a transition n(1) rarr n(2) wher...

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  7. The wavelength of the first line in balmer series in the hydrogen spec...

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  8. A monochromatic light is just able to ionize a hypothetical one electr...

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  9. In a transition to a state of ionization potential 30.6 V, (a) hydroge...

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  10. A (He)^(+) ion in ground state is fired towards a Hydrogen atom in'the...

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  11. A Bohr hydrogen atom unđergoes a transition n=5 rightarrow n=4 and emi...

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  12. The atom of a hydrogen' like gas are in a particulạr excited energy le...

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  13. The electron in the ground state of hydrogen atom produces a magnetic ...

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  14. Neutron in thermal equilibrium with matter at 27^(@)C can be brought t...

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  15. Hydrogen like atom of atomic,number Z is in an excited state of quantu...

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