Transition Metals and Their Properties

Professor Adam discusses transition metals, focusing on their unique properties such as partially filled d orbitals, variable oxidation states, and coordination numbers. The video explains how electronic configurations change when forming complexes, using examples like cobalt and vanadium. It covers oxidation processes in coordination complexes, highlighting nickel's role. Trends in the d-block, including atomic radius, ionization energy, and electronegativity, are explored. The video concludes with a discussion on platinum group metals and the lanthanide contraction, emphasizing the addition of f orbitals in transition metals.

What characteristic feature defines a transition metal element?

• A partially filled d orbital

• A completely filled s orbital

• A completely filled p orbital

• A partially filled f orbital

What happens to the electronic configuration of cobalt when forming a complex?

• Electrons move from 4p to 4d orbital

• Electrons move from 3p to 3d orbital

• Electrons move from 4s to 3d orbital

• Electrons move from 3d to 4s orbital

How does the electronic configuration of vanadium change in a complex?

• From 3d5 4s2 to 3d3

• From 3d3 4s2 to 3d5

• From 3d2 4s2 to 3d4

• From 3d4 4s2 to 3d6

What is the oxidation state of nickel in the hexa amine nickel II chloride complex?

• One

• Two

• Four

• Three

In the 3+ oxidation state, how many partially filled d orbitals does iron have?

• Three

• Four

• Five

• Six

What trend is observed in the atomic radius of d-block elements?

• A small decrease

• A significant decrease

• No change

• A significant increase

How does the electronegativity of transition metals change across the first series?

• It decreases significantly

• It increases significantly

• It remains constant

• It increases gently

Which group of transition metals is known for similar behavior to platinum?

• Gold group metals

• Platinum group metals

• Copper group metals

• Iron group metals

What is the term for the trend where the second and third row transition metals are larger than the first row?

• Actinide contraction

• Actinide expansion

• Lanthanide contraction

• Lanthanide expansion

What are columns in the d-block containing three elements called?

• Groups

• Triads

• Clusters

• Periods