Bohr’s Theory of Hydrogen Atom
Physics ⇒ Modern Physics
Bohr’s Theory of Hydrogen Atom starts at 11 and continues till grade 12.
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According to Bohr’s postulates, the angular momentum of an electron in a stationary orbit is quantized and given by L = n×h/2π. What does 'n' represent in this formula?
Calculate the energy of the photon emitted when an electron in a hydrogen atom jumps from n = 5 to n = 2.
Calculate the speed of the electron in the first Bohr orbit of hydrogen. (Given: e = 1.6×10-19 C, h = 6.63×10-34 J·s, me = 9.1×10-31 kg, ε0 = 8.85×10-12 C2/N·m2)
Calculate the wavelength of the photon emitted when an electron in a hydrogen atom jumps from n = 3 to n = 2. (Use hc = 1240 eV·nm)
Describe one experimental observation that led to the development of Bohr’s model of the atom.
Describe the process by which Bohr’s model explains the emission spectrum of hydrogen.
Explain why the Bohr model is successful in explaining the hydrogen spectrum but fails for multi-electron atoms.
Explain why the energy of the electron in the Bohr model is negative.
If the energy of the electron in the n = 4 orbit is -0.85 eV, what is the energy difference between n = 4 and n = 2?
If the radius of the first Bohr orbit is a0, what is the radius of the third orbit?
State Bohr’s first postulate for the hydrogen atom.
State the formula for the energy of the nth orbit in a hydrogen atom according to Bohr’s theory.
The radius of the nth orbit in a hydrogen atom is given by rn = n2a0, where a0 is the Bohr radius. What is the value of a0 in meters?
What is the main reason Bohr introduced quantization of angular momentum in his model?
What is the value of the ionization energy of hydrogen in electron volts (eV)?
Which series in the hydrogen spectrum corresponds to electron transitions ending at n = 1?
Who proposed the first quantum model of the hydrogen atom?
