d and f BLOCK ELEMENTS

Which of the following elements is a member of the 6d transition series?

• Scandium (Sc)
• Yttrium (Y)
• Hafnium (Hf)
• Copernicium (Cn)

Why are the f-block elements sometimes called 'inner transition metals'?

• Because they are located inside the main periodic table
• Because they were discovered after the main transition metals
• Because the d or f orbitals being filled are inner shells, shielded by outer electron shells
• Because they have lower energy than other transition metals

What is the main difference between the electronic configurations of typical transition metals and those of Zinc, Cadmium, and Mercury?

• Typical transition metals have s electrons, while Zn, Cd, and Hg have d electrons
• Typical transition metals have complete d subshells, while Zn, Cd, and Hg have incomplete d subshells
• Typical transition metals have incomplete d subshells, while Zn, Cd, and Hg have complete d10 subshells
• There is no significant difference in their electronic configurations

Which transition metal series includes the element Rutherfordium (Rf)?

• 3d series
• 4d series
• 5d series
• 6d series

What is the primary reason for placing f-block elements separately at the bottom of the periodic table?

• Because they are all radioactive
• Because they were discovered later
• To maintain the table's structure and readability while grouping elements with similar f-orbital filling
• Because they have very high atomic masses