Exploring the Bohr Model of an Atom

Which scientist's model was closest to Bohr's model of the atom?

• Thomson

• Rutherford

• Einstein

• Planck

What was the major drawback of Rutherford's model of the atom?

• It could not explain the atom's charge.

• It could not explain the atom's size.

• It could not explain the atom's stability.

• It could not explain the atom's mass.

According to Bohr, why do electrons not fall into the nucleus?

• They are repelled by the nucleus.

• They are too far from the nucleus.

• They are held by magnetic forces.

• They have fixed energy levels.

What did Bohr introduce to explain the fixed energy of electrons?

• Electron clouds

• Quantum numbers

• Fixed orbits

• Magnetic fields

What are the fixed energy orbits in Bohr's model called?

• Electron clouds

• Energy shells

• Quantum states

• Discrete orbits

How are the energy levels in Bohr's model represented?

• By colors red, blue, green, yellow

• By symbols α, β, γ, δ

• By numbers 1, 2, 3, 4

• By letters A, B, C, D

What is the main difference between Bohr's model and Rutherford's model?

• Bohr's model includes protons.

• Bohr's model includes neutrons.

• Bohr's model has fixed orbits for electrons.

• Bohr's model has a different nucleus.

In which year did Niels Bohr receive the Nobel Prize for his work on the structure of the atom?

• 1912

• 1942

• 1922

• 1932