Question

The +3 ion of which one of the following has half-filled 4f subshell?

Solution

Correct option is

Gd

 

Gd = [Xe] 4f7 5d1 6s2,

Gd3+ = [Xe] 4f7  (half-filled)

SIMILAR QUESTIONS

Q1

Acidified solution of chromic acid on treatment with hydrogen peroxide yields

Q2

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Q3

On adding excess of NH3 solution CuSO4 solution, the dark blue colour is due to

Q4

Which statement is not correct?

Q5

Yellow mercury (II) oxide is obtained when

Q6

Which of the following method can’t be used to prepare anhydrous zinc chloride?

Q7

Which lanthanoid compound is used as a most powerful liquid lasers after dissolving it in selenium oxychloride?

Q8

Which one of the following acts as an oxidizing agent?

Q9

Across the lanthanide series, the basicity of lanthanide hydroxides

Q10

Actinides