d and f BLOCK ELEMENTS

Based on the general trend 4fⁿ for Ln³⁺ ions, what would be the expected electronic configuration for the tripositive ion of Neodymium (Nd)?

• 4f³
• 4f⁴
• 4f²
• 4f⁵

Based on the general trend 4fⁿ for Ln³⁺ ions, what would be the expected electronic configuration for the tripositive ion of Samarium (Sm)?

• 4f⁵
• 4f⁶
• 4f⁴
• 4f⁷

Based on the general trend 4fⁿ for Ln³⁺ ions, what would be the expected electronic configuration for the tripositive ion of Gadolinium (Gd)?

• 4f⁷
• 4f⁶
• 4f⁸
• 5d¹

What is the primary electronic factor that differentiates the stability of Tb⁴⁺ from Tb³⁺?

• Tb⁴⁺ achieves a half-filled (4f⁷) configuration, while Tb³⁺ has a 4f⁸ configuration
• Tb⁴⁺ has a filled f-subshell, while Tb³⁺ has a half-filled f-subshell
• Tb⁴⁺ has one unpaired electron, while Tb³⁺ has two
• Tb⁴⁺ is diamagnetic, while Tb³⁺ is paramagnetic

What is the primary electronic factor that differentiates the stability of Yb²⁺ from Yb³⁺?

• Yb²⁺ achieves a filled (4f¹⁴) configuration, while Yb³⁺ has a 4f¹³ configuration
• Yb²⁺ has a half-filled f-subshell, while Yb³⁺ has a filled f-subshell
• Yb²⁺ has no unpaired electrons, while Yb³⁺ has one
• Yb²⁺ is paramagnetic, while Yb³⁺ is diamagnetic