30 Questions
What is the wavelength of the emitted radiation dependent on?
Energy difference between the energy levels
What is the number of spectral lines emitted if an electron jumps from nth orbit to ground state?
(n-1)n
Which series of spectral lines is formed when an electron jumps from higher energy orbit to lower energy orbit?
Any of the above
What is the relationship between the wave number and the wavelength of the emitted radiation?
Wave number is inversely proportional to the wavelength
What is the energy difference between the energy levels dependent on?
Rydberg constant and the atomic number
What is the term for the numbers that provide complete information about all the electrons in an atom?
Quantum numbers
What is the physical phenomenon that occurs when an electron transitions to a lower energy level, resulting in the emission of a photon?
Emission spectrum
What is the maximum wavelength of the first member of a spectral series, such as the Balmer series?
$\lambda_{max}$
According to Bohr's theory, what is the relationship between the energy levels of an electron and its corresponding orbital radii?
Energy levels are inversely proportional to orbital radii
What is the condition for the emission of spectral lines from a hydrogen atom, according to Bohr's theory?
$n_2 > n_1$
What is the energy of the first excited state of a hydrogen atom?
– 3.4 eV
What is the energy required to remove an electron from a hydrogen atom in its ground state?
13.6 eV
What is the frequency of the photon emitted when an electron transitions from a higher energy level to a lower energy level?
ν = E2 – E1 / h
What is the characteristic of the spectral lines emitted by a hydrogen atom?
They are sharp and straight vertical lines of a single colour
What is the equation that describes the energy levels of a hydrogen atom?
E = – 13.6 / n^2
What is the relationship between the nuclear radius and the mass number of an atom?
R ∝ A^1/3
What is the volume of the nucleus given by?
3/4 π (R A^1/3)^3
What is responsible for keeping the nucleons bound together in the nucleus?
Strong nuclear force
What is the nuclear density of an atom given by?
mA / (4/3 π (R A^1/3)^3)
What is the name of the scientist who proposed the theory of exchange of mesons between nucleons to explain the nuclear force?
Yukawa
What percentage of the mass is accounted for by the nucleus in the atomic structure?
99.95%
What is the main purpose of the Geiger and Marsden experiment?
To study the scattering of α-particles by gold foil
What is the main limitation of Thomson's atomic model?
It cannot explain the scattering of α-particles
What is the main characteristic of the α-particles that are scattered by 180°?
They are very few in number
What is the relationship between the number of scattered particles (N) and the thickness of the foil (t)?
N ∝ t
What is the approximate size of the nucleus in meters?
10^-15 m
What is the proportion of the nucleus to the total volume of the atom?
less than 10^(-12)%
What is the force that holds quarks together inside a nucleus?
Strong nuclear force
What is the density of the nucleus in comparison to the atom?
Much denser
Which physicist's theory described the strong nuclear force?
Yukawa
This quiz covers the concepts of emission spectra, wave number, and wavelength in atomic physics. It includes formulas and equations related to energy transitions and spectral lines. Test your understanding of atomic physics and spectroscopy.
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