The Line Spectra of the Hydrogen Atom
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PHXII12:ATOMS

356586 A sample of monatomic hydrogen gas contains 100 atoms and all the atoms are in \({n}\)th excited state.As the atoms come down to the ground state following various transitions, they release a total energy of \({\dfrac{4800}{49} R {ch}}\). (where,1 \(Rch\) \({=13.6 {eV}}\)). Find the value of \({N}\), where maximum possible number of photons emitted in the process is \({7 N \times 100}\).

1 3
2 7
3 9
4 1
PHXII12:ATOMS

356587 The ionisation potential of \(H\)-atom is \(13.6\;V\). When it is excited from ground state by monochromatic radiations of \(970.6\) \( \mathop A^{~~\circ} \) the number of emission lines will be (according to Bohr's theory)

1 10
2 8
3 6
4 4
PHXII12:ATOMS

356588 In hydrogen atom, electron makes transition from \(n = 4\) to \(n = 1\) level. Recoil momentum of the \(H\) atom will be

1 \(3.4 \times {10^{ - 27}}N - \sec \)
2 \(6.8 \times {10^{ - 27}}N - \sec \)
3 \(3.4 \times {10^{ - 24}}N - \sec \)
4 \(6.8 \times {10^{ - 24}}N - \sec \)
PHXII12:ATOMS

356589 In figure the energy levels of the hydrogen atom have been shown along with some transitions marking \(A,B,C\). The transitions \(A,B\) and \(C\) respectively represents:
supporting img

1 the first member of the Lyman series, thrid line of Balmer series and second line of Paschen series.
2 the ionisation potential of \(H\), second line of Balmer series and third line of Paschen series.
3 the series limit of Lyman series, second line of Balmer series and second of line Paschen series.
4 the series limit of Lyman series, third line of Balmer series and second line of Paschen series.
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PHXII12:ATOMS

356586 A sample of monatomic hydrogen gas contains 100 atoms and all the atoms are in \({n}\)th excited state.As the atoms come down to the ground state following various transitions, they release a total energy of \({\dfrac{4800}{49} R {ch}}\). (where,1 \(Rch\) \({=13.6 {eV}}\)). Find the value of \({N}\), where maximum possible number of photons emitted in the process is \({7 N \times 100}\).

1 3
2 7
3 9
4 1
PHXII12:ATOMS

356587 The ionisation potential of \(H\)-atom is \(13.6\;V\). When it is excited from ground state by monochromatic radiations of \(970.6\) \( \mathop A^{~~\circ} \) the number of emission lines will be (according to Bohr's theory)

1 10
2 8
3 6
4 4
PHXII12:ATOMS

356588 In hydrogen atom, electron makes transition from \(n = 4\) to \(n = 1\) level. Recoil momentum of the \(H\) atom will be

1 \(3.4 \times {10^{ - 27}}N - \sec \)
2 \(6.8 \times {10^{ - 27}}N - \sec \)
3 \(3.4 \times {10^{ - 24}}N - \sec \)
4 \(6.8 \times {10^{ - 24}}N - \sec \)
PHXII12:ATOMS

356589 In figure the energy levels of the hydrogen atom have been shown along with some transitions marking \(A,B,C\). The transitions \(A,B\) and \(C\) respectively represents:
supporting img

1 the first member of the Lyman series, thrid line of Balmer series and second line of Paschen series.
2 the ionisation potential of \(H\), second line of Balmer series and third line of Paschen series.
3 the series limit of Lyman series, second line of Balmer series and second of line Paschen series.
4 the series limit of Lyman series, third line of Balmer series and second line of Paschen series.
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PHXII12:ATOMS

356586 A sample of monatomic hydrogen gas contains 100 atoms and all the atoms are in \({n}\)th excited state.As the atoms come down to the ground state following various transitions, they release a total energy of \({\dfrac{4800}{49} R {ch}}\). (where,1 \(Rch\) \({=13.6 {eV}}\)). Find the value of \({N}\), where maximum possible number of photons emitted in the process is \({7 N \times 100}\).

1 3
2 7
3 9
4 1
PHXII12:ATOMS

356587 The ionisation potential of \(H\)-atom is \(13.6\;V\). When it is excited from ground state by monochromatic radiations of \(970.6\) \( \mathop A^{~~\circ} \) the number of emission lines will be (according to Bohr's theory)

1 10
2 8
3 6
4 4
PHXII12:ATOMS

356588 In hydrogen atom, electron makes transition from \(n = 4\) to \(n = 1\) level. Recoil momentum of the \(H\) atom will be

1 \(3.4 \times {10^{ - 27}}N - \sec \)
2 \(6.8 \times {10^{ - 27}}N - \sec \)
3 \(3.4 \times {10^{ - 24}}N - \sec \)
4 \(6.8 \times {10^{ - 24}}N - \sec \)
PHXII12:ATOMS

356589 In figure the energy levels of the hydrogen atom have been shown along with some transitions marking \(A,B,C\). The transitions \(A,B\) and \(C\) respectively represents:
supporting img

1 the first member of the Lyman series, thrid line of Balmer series and second line of Paschen series.
2 the ionisation potential of \(H\), second line of Balmer series and third line of Paschen series.
3 the series limit of Lyman series, second line of Balmer series and second of line Paschen series.
4 the series limit of Lyman series, third line of Balmer series and second line of Paschen series.
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PHXII12:ATOMS

356586 A sample of monatomic hydrogen gas contains 100 atoms and all the atoms are in \({n}\)th excited state.As the atoms come down to the ground state following various transitions, they release a total energy of \({\dfrac{4800}{49} R {ch}}\). (where,1 \(Rch\) \({=13.6 {eV}}\)). Find the value of \({N}\), where maximum possible number of photons emitted in the process is \({7 N \times 100}\).

1 3
2 7
3 9
4 1
PHXII12:ATOMS

356587 The ionisation potential of \(H\)-atom is \(13.6\;V\). When it is excited from ground state by monochromatic radiations of \(970.6\) \( \mathop A^{~~\circ} \) the number of emission lines will be (according to Bohr's theory)

1 10
2 8
3 6
4 4
PHXII12:ATOMS

356588 In hydrogen atom, electron makes transition from \(n = 4\) to \(n = 1\) level. Recoil momentum of the \(H\) atom will be

1 \(3.4 \times {10^{ - 27}}N - \sec \)
2 \(6.8 \times {10^{ - 27}}N - \sec \)
3 \(3.4 \times {10^{ - 24}}N - \sec \)
4 \(6.8 \times {10^{ - 24}}N - \sec \)
PHXII12:ATOMS

356589 In figure the energy levels of the hydrogen atom have been shown along with some transitions marking \(A,B,C\). The transitions \(A,B\) and \(C\) respectively represents:
supporting img

1 the first member of the Lyman series, thrid line of Balmer series and second line of Paschen series.
2 the ionisation potential of \(H\), second line of Balmer series and third line of Paschen series.
3 the series limit of Lyman series, second line of Balmer series and second of line Paschen series.
4 the series limit of Lyman series, third line of Balmer series and second line of Paschen series.
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