Practice Questions Bohr’s Atomic Model

What does Bohr’s atomic model state about electrons?

• They move freely around the nucleus.

• They travel in fixed energy levels around the nucleus.

• They do not move within the atom.

• They continuously lose energy and fall into the nucleus.

What must an electron do to move from a lower energy level to a higher one?

• Absorb a quantum of energy.

• Release a photon.

• Lose an electron.

• Gain a proton.

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What is a quantum?

• The space between energy levels.

• A fixed amount of energy required to move an electron between levels.

• A type of subatomic particle.

• A continuous range of energy values.

What happens when an excited electron returns to its ground state?

• It emits energy in the form of light.

• It absorbs a photon.

• It disappears from the atom.

• It loses a proton.

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Which spectrum is produced when an atom emits energy?

• Continuous spectrum

• Absorption spectrum

• Line-emission spectrum

• Dark spectrum

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What determines the color of light emitted by an atom?

• The amount of energy released when an electron moves to a lower energy level.

• The number of protons in the nucleus.

• The movement of neutrons.

• The type of chemical bonds in the atom.

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What does the line-emission spectrum of an element show?

• That electrons can exist at any energy level.

• That electrons release specific amounts of energy when moving between levels.

• That atoms emit all wavelengths of light equally.

• That electrons lose energy in a continuous manner.

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How does the energy of a photon compare to the energy difference between two energy levels?

• The photon’s energy is equal to the energy difference.

• The photon’s energy is always greater than the energy difference.

• The photon’s energy is always less than the energy difference.

• There is no relationship between photon energy and energy levels.

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Why does Bohr’s model explain why atoms are stable?

• Electrons remain in specific energy levels and do not continuously lose energy.

• Electrons constantly move between orbits, gaining and losing energy.

• Atoms absorb all wavelengths of light, making them stable.

• Electrons are fixed in place and do not move.

How does a line-emission spectrum provide evidence that electrons exist in specific energy levels?

• It shows that atoms emit only specific wavelengths of light, not a continuous range.

• It demonstrates that electrons do not move at all.

• It proves that atoms emit energy in an unpredictable way.

• It shows that electrons can move freely within the atom.

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