d and f BLOCK ELEMENTS

Which process involves the removal of an electron from a 4s orbital before a 3d orbital in transition metals?

• First ionization
• Second ionization
• Third ionization
• All ionizations equally

What is the primary reason d5 and d10 configurations are considered particularly stable?

• They maximize exchange energy or achieve spherical symmetry
• They have the lowest number of electrons
• They are closest to the nucleus
• They have the highest number of electrons

How does the concept of exchange energy relate to the difficulty of ionization?

• Higher exchange energy stabilization makes ionization more difficult
• Lower exchange energy stabilization makes ionization more difficult
• Exchange energy has no effect on ionization
• Exchange energy only affects the first ionization

Which of the following d configurations would NOT experience a significant gain in stabilization from exchange energy upon losing one electron?

• d5
• d6
• d1
• d9

What is the electronic configuration associated with maximum exchange energy stabilization for a d subshell?

• Either half-filled (d5) or completely filled (d10)
• Only half-filled (d5)
• Only completely filled (d10)
• Partially filled (d1 to d4)