d and f BLOCK ELEMENTS

Why do transition metals and many of their compounds exhibit paramagnetic behavior?

• They have paired electrons in s-orbitals.
• Presence of unpaired electrons in d-orbitals.
• They contain only paired electrons.
• They lack d-electrons.

What are the common oxidation states exhibited by the Lanthanoids?

• +1, +2, +3
• +2, +3, +4
• +3 only
• +3, +5, +7

How does the electronic configuration of transition elements differ from that of non-transition elements?

• Transition elements have completely filled d subshells.
• Transition elements lack s electrons.
• Transition elements have incompletely filled d subshells in their ground state or common oxidation states.
• Transition elements have fewer valence electrons.

Which of the following d-block elements is generally NOT considered a transition element?

• Iron (Fe)
• Copper (Cu)
• Zinc (Zn)
• Vanadium (V)

What is a key characteristic that defines transition elements?

• They have low melting points.
• They exhibit only one oxidation state.
• They have partially filled d-orbitals in their ground state or in one of their common oxidation states.
• They are all radioactive.