Understanding Quantum Numbers and Atomic Models

What is the main difference between the Bohr model and quantum mechanics in describing the hydrogen atom?

• Both models use probability to describe electron positions.

• Bohr model uses probability, while quantum mechanics describes fixed orbits.

• Bohr model describes electrons in fixed orbits, while quantum mechanics uses probability.

• Both models describe electrons in fixed orbits.

What does the principal quantum number (n) indicate?

• The orientation of the orbital

• The shape of the orbital

• The spin of the electron

• The main energy level of the electron

As the principal quantum number increases, what happens to the electron's average distance from the nucleus?

• It decreases

• It remains the same

• It increases

• It becomes zero

What does the angular momentum quantum number (l) determine?

• The shape of the orbital

• The energy level of the electron

• The spin of the electron

• The orientation of the orbital

What is the shape of an s orbital?

• Sphere

• Bow-tie

• Dumbbell

• Cube

How many possible values can the magnetic quantum number (ml) have when l is equal to 1?

• Four

• Three

• Two

• One

What does the magnetic quantum number (ml) indicate?

• The orientation of the orbital

• The energy level of the electron

• The shape of the orbital

• The spin of the electron

What is the shape of a p orbital?

• Sphere

• Pyramid

• Dumbbell

• Cube

What are the possible values for the spin quantum number (ms)?

• 0 and 1

• +1/2 and -1/2

• +1 and -1

• +2 and -2

What does the spin quantum number (ms) represent?

• The energy level of the electron

• The shape of the orbital

• The orientation of the orbital

• The intrinsic angular momentum of the electron