The energy of the highest energy photon of Balmer series of hydrogen spectrum is close to(a) 13.6 eV(b) 3.4 eV(c) 1.5 eV (d) 0.85 eV
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Atomic and Nuclear Physics questions
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Which state of triply ionised Baryllium $(Be^{+++})$ has the same orbital radius as that of the ground state of hydrogen
- A$n = 4$
- B$n = 3$
- ✓$n = 2$
- D$n = 1$
Answer: C.
View full solution →The Rutherford $\alpha$-particle experiment shows that most of the $\alpha$-particles pass through almost unscattered while some are scattered through large angles. What information does it give about the structure of the atom
- AAtom is hollow
- BThe whole mass of the atom is concentrated in a small centre called nucleus
- CNucleus is positively charged
- ✓All the above
Answer: D.
View full solution →The figure indicates the energy level diagram of an atom and the origin of six spectral lines in emission $($e.g. line no. $5$ arises from the transition from level $B$ to $A).$ The following spectral lines will also occur in the absorption spectrum
- A$1, 4, 6$
- B$4, 5, 6$
- ✓$1, 2, 3$
- D$1, 2, 3, 4, 5, 6$
Answer: C.
View full solution →Imagine an atom made up of a proton and a hypothetical particle of double the mass of the electron but having the same charge as the electron. Apply the Boh’r atom model and consider all possible transitions of this hypothetical particle to the first excited level. The longest wavelength photon that will be emitted has wavelength l $($given in terms of the Rydberg constant $R$ for the hydrogen atom$)$ equal to
- A$9/(5R)$
- B$36/(5R)$
- ✓$18/(5R)$
- D$4/R$
Answer: C.
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