Niels Bohr and the Rutherford model

The video discusses the evolution of atomic models, starting with Rutherford's model, which introduced electrons orbiting a nucleus but had stability issues. Niels Bohr refined this in 1913 by proposing that electrons travel in fixed orbits without radiating energy, similar to planets around the Sun. Each orbit corresponds to a specific energy level, and electrons can move between levels by absorbing or emitting energy as photons. Bohr's model accurately described hydrogen and laid the groundwork for the quantum mechanical model of the atom.

What was a major flaw in Rutherford's atomic model?

• It did not account for protons.

• It proposed that electrons are stationary.

• It suggested electrons would lose energy and destabilize atoms.

• It did not include a nucleus.

How did Bohr's model differ from Rutherford's in terms of electron behavior?

• Bohr suggested electrons are stationary.

• Bohr eliminated the concept of a nucleus.

• Bohr proposed electrons radiate energy constantly.

• Bohr introduced fixed orbits for electrons.

What determines the energy level of an electron in Bohr's model?

• The size of the electron.

• The distance from the nucleus.

• The speed of the electron.

• The number of protons in the nucleus.

What happens when an electron moves from a higher to a lower energy level?

• It emits a photon.

• It absorbs a photon.

• It becomes a proton.

• It gains energy.

Which atom's behavior was accurately described by Bohr's model?

• Hydrogen

• Oxygen

• Carbon

• Helium