d and f BLOCK ELEMENTS

Which of the following best describes the Aufbau principle?

• Electrons fill orbitals starting with the lowest energy orbital available.
• Electrons must have opposite spins in the same orbital.
• No two electrons can have the same set of four quantum numbers.
• Electrons prefer to occupy separate orbitals with parallel spins.

What is the maximum number of electrons that can be accommodated in the 'f' subshell?

• 6
• 10
• 14
• 18

Which of the following is a characteristic of the d-block elements (transition metals)?

• They have low melting points.
• They readily form colorless compounds.
• They often exhibit variable oxidation states.
• They are generally unreactive.

Which of the following quantum numbers determines the orientation of an orbital in space?

• Principal quantum number (n)
• Azimuthal quantum number (l)
• Magnetic quantum number (ml)
• Spin quantum number (ms)

Which of the following quantum numbers determines the shape of an orbital?

• Principal quantum number (n)
• Azimuthal quantum number (l)
• Magnetic quantum number (ml)
• Spin quantum number (ms)