d and f BLOCK ELEMENTS

According to the text, where do maxima in properties like strength often occur within a transition series?

• At the start of each series
• At the end of each series
• About the middle of each series
• Randomly throughout each series

What is attributed to the high melting and boiling points of transition elements?

• Weak interatomic forces
• Involvement of only ns electrons
• Low atomic masses
• Involvement of (n–1)d electrons

Which of the following is NOT a typical metallic property of transition elements?

• High tensile strength
• Ductility
• Malleability
• Low tensile strength

Corresponding to the filling of 3d, 4d, and 5d orbitals, how many series of transition elements are recognized?

• One
• Two
• Three
• Four

Which block of the periodic table contains elements with progressively filled 4f and 5f orbitals?

• s-block
• p-block
• d-block
• f-block