d and f BLOCK ELEMENTS

What makes half-filled and completely filled d-orbitals particularly stable?

• Higher energy
• Less symmetry
• Relatively more stable
• Greater number of electrons

Why do transition elements sometimes not follow the expected electronic configuration?

• Large atomic size
• High nuclear charge
• Small energy difference between (n-1)d and ns orbitals
• Presence of f-electrons

What is the general electronic configuration of the outer orbitals for transition elements?

• (n-1)d0ns1–2
• (n-1)d1–10ns1–2
• (n-1)d10ns0–1
• (n-1)d0–10ns2

How many series of transition elements are there based on the d-orbitals being filled?

• Two
• Three
• Four
• Five

What orbitals are being filled in the d-block elements?

• ns orbitals
• np orbitals
• nd orbitals
• (n-1)d orbitals