Understanding the Bohr Radius and Hydrogen Atom

What is the Bohr radius approximately equal to in a hydrogen atom?

• The most probable distance between the nucleus and the electron

• The distance between two electrons

• The distance between two protons

• The diameter of the electron cloud

Which law is used to calculate the electric force between the proton and electron in a hydrogen atom?

• Boyle's Law

• Coulomb's Law

• Ohm's Law

• Newton's First Law

What is the relationship between the electric force and centripetal force in the Bohr model?

• They are equal in magnitude and direction

• They are both zero

• They are unrelated

• They are equal in magnitude but opposite in direction

What did Bohr hypothesize about the angular momentum of electrons?

• It is continuous

• It is quantized

• It is always zero

• It is infinite

Why do we see distinct lines in the emission spectrum of hydrogen?

• Due to quantized angular momentum

• Because of random electron movement

• Because of continuous angular momentum

• Due to infinite energy levels

What constant is used in the quantization of angular momentum?

• Avogadro's number

• Planck's constant

• Boltzmann's constant

• Gravitational constant

What is the value of the Bohr radius for the ground state of hydrogen?

• 2.1 x 10^-10 meters

• 1.0 x 10^-10 meters

• 5.3 x 10^-11 meters

• 3.0 x 10^-11 meters

Which of the following remains constant when calculating the Bohr radius for excited states?

• The velocity

• The radius

• Coulomb's constant

• The value of n

How does the Bohr radius change for the first excited state compared to the ground state?

• It doubles

• It halves

• It quadruples

• It remains the same

What is the general formula for the Bohr radius in terms of n?

• R = constant * n

• R = n^2 * constant

• R = n * constant

• R = constant / n^2