Quantum Numbers and Orbitals

What does the principal quantum number (n) describe?

• The shape of the sublevel

• The orientation of the orbital

• The energy level of an electron

• The spin of an electron

Which of the following angular momentum quantum number (l) values corresponds to a p-sublevel?

• 0

• 1

• 2

• 3

If the principal quantum number (n) is 3, what are the possible values for the angular momentum quantum number (l)?

• l = 0, 1

• l = 0, 1, 2

• l = 1, 2, 3

• l = 0, 1, 2, 3

For an electron in a 4f sublevel, what are the values for the principal quantum number (n) and the angular momentum quantum number (l)?

• n = 4, l = 2

• n = 3, l = 3

• n = 4, l = 3

• n = 3, l = 2

What are the possible magnetic quantum number (m_l) values for an electron in a d sub-level?

• -1, 0, 1

• -2, -1, 0, 1, 2

• -3, -2, -1, 0, 1, 2, 3

• 0

How many orbitals are present in an f sub-level?

• 1

• 3

• 5

• 7

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

• 0

• +1/2 only

• -1/2 only

• +1/2 and -1/2

For the 3d^8 electron, what are the magnetic quantum number (m_l) and electron spin quantum number (m_s) for the 8th electron, assuming electrons fill orbitals with parallel spins first?

• m_l = -2, m_s = -1/2

• m_l = -1, m_s = -1/2

• m_l = 0, m_s = -1/2

• m_l = 1, m_s = -1/2