d and f BLOCK ELEMENTS

Which element's tripositive ion (Ln³⁺) would have an electronic configuration of 4f⁴?

• Neodymium
• Praseodymium
• Promethium
• Samarium

What is the electronic configuration of the most common stable ion formed by Cerium?

• 4f¹
• 4f⁰
• 4f²
• 5d¹

Which element's tripositive ion (Ln³⁺) would have an electronic configuration of 4f⁹?

• Dysprosium
• Terbium
• Holmium
• Erbium

What is the electronic configuration of the most common stable ion formed by Ytterbium?

• 4f¹³
• 4f¹⁴
• 4f¹²
• 4f¹⁵

What is the electronic configuration of the most common stable ion formed by Europium?

• 4f⁶
• 4f⁷
• 4f⁵
• 4f⁸