Using the data from Rutherford’s gold foil experiment, estimate the approximate radius of the gold nucleus if the closest approach distance of an alpha particle with kinetic energy 7.7 MeV is 3.2 × 10⁻¹⁴ m. Assume the alpha particle cannot approach closer than the nuclear radius.
If the speed of an electron is doubled, what happens to its de Broglie wavelength?
If an unknown gas produces an emission spectrum with lines at wavelengths matching sodium and hydrogen, what can be concluded about the gas?
If the uncertainty in a particle's position is reduced, the uncertainty in its momentum will:
An electron moves at \(2.0 \times 10^6\ \text{m/s}\). Its de Broglie wavelength is approximately:
Why were most alpha particles in Rutherford's experiment only slightly deflected rather than strongly deflected or stopped?
What is the primary difference between an emission spectrum and an absorption spectrum of a gas?
On a KE_max vs f graph, the y-intercept (extrapolated) represents:
Which observation from the gold foil experiment directly contradicted Thomson's plum pudding model?
In spectroscopy, the intensity of an absorption line depends primarily on which property of the gas sample?
In the \(KE_{\text{max}}\) vs frequency graph, the x-intercept represents:
How did Rutherford interpret the large-angle deflections observed in the alpha particle scattering experiment?
A particle of mass \(m\) moves with momentum \(p\). Which expression gives its de Broglie wavelength?
The de Broglie wavelength of a moving particle is given by the equation:
A gas mixture contains unknown quantities of helium and neon. Which method would most accurately determine the composition based on their emission spectra?
In a graph of \(KE_{\text{max}}\) versus frequency for the photoelectric effect, the slope of the line represents:
In a graph of \(KE_{\max}\) against frequency \(f\) for the photoelectric effect, the y-intercept has a value of \(-3.2 \times 10^{-19}\ \text{J}\). What does this value represent?
Calculate the photon energy (in eV) emitted by a gas atom that emits light at 656 nm. Use this to identify the possible element if the emission corresponds to a known spectral line.
In the context of Rutherford's experiment, which of the following best explains the significance of the rare large-angle scattering events?
The fact that the slope of the \(KE_{\max}\) vs frequency graph is the same for all metals confirms that:
In the \(KE_{\max}\) vs frequency graph, the y-intercept represents:
Why don't we observe the wave behaviour of macroscopic objects like baseballs?
According to Thomson's plum pudding model, how are electrons arranged within the atom?
If the momentum of a particle is doubled, its de Broglie wavelength will:
According to Thomson's model, how are electrons distributed within the atom?