Bohr Model Worksheets

In a Bohr model of an electron moving from a ground state to an excited state, what happens to the electron's orbit and energy? Clearly label in your description.

• It moves to a larger-radius, higher-n energy level and absorbs energy.

• It moves to a smaller-radius, lower-n energy level and absorbs energy.

• It moves to a larger-radius, higher-n energy level and releases energy.

• It stays in the same energy level without any energy change.

Did the electron in the previous question absorb or release energy in order to make the move from ground state to excited state?

• Absorb energy

• Release energy

Tags

NGSS.HS-PS4-3

Sketch an example of an emission-line spectrum (don’t need to use colors). Which description best matches an emission-line spectrum?

Tags

NGSS.HS-ESS1-2

How does an emission-line spectrum relate to the Bohr model of the atom/quantized energy?

• Each bright line corresponds to a photon emitted when an electron drops between specific quantized energy levels.

• The lines represent continuous energy output from electrons moving randomly without levels.

• Emission lines appear because nuclei change mass during chemical reactions.

• Emission spectra display the positions of protons within fixed orbits.

Tags

NGSS.HS-PS4-3

Is the Bohr model the current model of the atom (i.e., do we still consider the Bohr model to be accurate today)? Why or why not?

• No; it is superseded by the quantum mechanical model and works well mainly for hydrogen-like atoms.

• Yes; it accurately describes all multi-electron atoms and their spectra.

• Yes; it fully explains electron behavior using classical orbits for every element.

• No; it was replaced because it could not describe proton behavior in solids.

In a Bohr model of an electron moving from an excited state to a ground state, what happens to the electron's orbit and energy? Clearly label in your description.

• It moves to a smaller-radius, lower-n energy level and releases energy.

• It moves to a larger-radius, higher-n energy level and absorbs energy.

• It stays in the same energy level with no energy change.

• It moves to a smaller-radius, lower-n energy level and absorbs energy.

Tags

NGSS.HS-PS4-3

Is the Bohr model the current model of the atom (i.e., do we still consider the Bohr model to be accurate today)? Why or why not?

• No; it is superseded by the quantum mechanical model and is most accurate for hydrogen-like atoms.

• Yes; it perfectly models all elements without limitations.

• Yes; it remains the standard because electrons orbit like planets for all atoms.

• No; it was discarded because it only models proton motion.

Which description best matches an emission-line spectrum?

• Discrete bright lines on a dark background

• Continuous rainbow of all wavelengths

• Dark lines interrupting a bright continuous spectrum

• A single solid color block with no lines

Tags

NGSS.HS-PS1-2

How does an emission-line spectrum relate to the Bohr model of the atom/quantized energy?

• Each bright line corresponds to a photon emitted when an electron transitions between specific quantized energy levels.

• Emission lines show continuous energy release from electrons orbiting classically.

• Emission lines mark where neutrons occupy fixed shells.

• Emission spectra indicate nuclear decay, not electron transitions.

Tags

NGSS.HS-PS4-3

According to the Bohr Model, which particles exist only at specific energy levels?

• protons

• neutrons

• electrons

• both neutrons and electrons