Which of the following ion is colourless - CUETMOCK

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Home Questions 99DFXXQJRG

Target Exam

CUET

Subject

Chemistry

Chapter

Inorganic: D and F Block Elements

Question:

Which of the following ion is colourless?

Options:

Pm³⁺

Er³⁺

Gd³⁺

Tb³⁺

Correct Answer:

Gd³⁺

Explanation:

Gd³⁺is colourless.

₆₄Gd: [Xe]4f⁷5d¹6s²

Gd³⁺: [Xe]4f⁷

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