Atomic Models
Physics ⇒ Modern Physics
Atomic Models starts at 9 and continues till grade 12.
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See sample questions for grade 11
According to Bohr's model, the angular momentum of an electron in a stable orbit is quantized. State the formula for the quantization of angular momentum.
Calculate the energy difference between the first and second energy levels of a hydrogen atom.
Calculate the radius of the third Bohr orbit (n=3) for a hydrogen atom. (Given: radius of first orbit r1 = 0.53 Å)
Describe one experimental observation from Rutherford's gold foil experiment that contradicted Thomson's model.
Describe the main difference between Rutherford's and Bohr's atomic models.
Explain why the classical Rutherford model could not explain the stability of atoms.
In Rutherford's gold foil experiment, most alpha particles passed through the foil undeflected. What does this observation suggest about the structure of the atom?
Name the scientist who first suggested that atoms are mostly empty space.
State one major limitation of Rutherford's atomic model.
State the postulate of Bohr's model regarding the emission of radiation by electrons.
Which atomic model explained the discrete line spectra of hydrogen?
Which atomic model is also known as the 'plum pudding' model?
Which experiment led to the discovery of the nucleus in the atom?
Which experiment provided evidence for the existence of electrons?
Which scientist discovered the electron?
Which scientist's model first introduced the concept of a central nucleus in the atom?
Who proposed the first atomic model based on indivisible particles?
