Bohr Model of the Atom

Who spotted a problem with the planetary model of the atom proposed by Ernest Rutherford?

• Ernest Rutherford

• Niels Bohr

• Marie Curie

• James Chadwick

What did Niels Bohr observe about charged particles in motion?

• They emit electromagnetic radiation

• They become neutral

• They gain energy

• They shrink in size

What did Niels Bohr's model help explain about the spectra of high energy atoms?

• The presence of ultraviolet light

• The lack of light emission

• The smooth spectrum of light observed

• The discrete units of light observed

In the Bohr model, how do electrons move between energy levels?

• By changing their charge

• By changing their spin

• By increasing their mass

• By absorbing and emitting photons

What is the relationship between the number of protons and electrons in a neutral atom?

• Electrons are more than protons

• Protons are more than electrons

• They are equal

• They are unrelated

What did the Balmer series of hydrogen spectra show?

• Infrared light emission

• Absence of light emission

• Continuous spectrum of light

• Discrete units of light emission

How does an electron move to a higher energy level in the Bohr model?

• By changing its charge

• By changing its mass

• By emitting energy

• By absorbing energy

What did the Bohr model predict accurately about the spectra of hydrogen?

• The numbers and wavelengths of light emission

• The absence of light emission

• The presence of ultraviolet light

• The continuous spectrum of light

What is the term used to describe the specific energy levels an electron can occupy in the Bohr model?

• Infinite orbits

• Quantized orbits

• Continuous orbits

• Random orbits

What is the Bohr model primarily based on?

• Hydrogen

• Oxygen

• Carbon

• Nitrogen