d and f BLOCK ELEMENTS

What is the approximate ionic radius of Ho³⁺?

• 87 pm
• 88 pm
• 89 pm
• 90 pm

What is the approximate ionic radius of Dy³⁺?

• 89 pm
• 90 pm
• 91 pm
• 92 pm

What is the electronic configuration of the Lu³⁺ ion?

• 4f¹³
• 4f¹⁴
• 4f¹⁴5d¹
• 5d¹4f¹³

What is the electronic configuration of the Tm³⁺ ion?

• 4f¹¹
• 4f¹²
• 4f¹³
• 4f¹⁴

What is the electronic configuration of the Er³⁺ ion?

• 4f¹⁰
• 4f¹¹
• 4f¹²
• 4f¹³