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  1. Problems
  2. /The d- and f-Block Elements
  3. /Lanthanoids and Actinoids (f-Block)

Lanthanoids and Actinoids (f-Block)

Chemistry
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More in The d- and f-Block ElementsTransition Elements (d-Block)Lanthanoids and Actinoids (f-Block)
11 problems
Exam:
Type:
1.
Americium has the configuration [Rn] 5f⁷ 7s² and its highest known oxidation state is +6… New
High School (11–12) · Lanthanoids and Actinoids (f-Block)A-Level, IB, NEETStemPy LabStemPy Lab
Hard
2.
A smoke detector holds 0.52 mg of americium-241, with a half-life of 432 years… New
High School (11–12) · Lanthanoids and Actinoids (f-Block)StemPy LabStemPy Lab
Medium
3.
A nucleus of uranium-238 (atomic number 92) absorbs a neutron… New
High School (11–12) · Lanthanoids and Actinoids (f-Block)A-Level, IB, NEETStemPy LabStemPy Lab
Medium
4.
The ion Y³⁺ has a radius of 90.0 pm. The radii of the 3+ ions of the heavy lanthanoids are: Gd… New
High School (11–12) · Lanthanoids and Actinoids (f-Block)StemPy LabStemPy Lab
Hard
5.
The radius of Sm³⁺ is 95.8 pm and that of Yb³⁺ is 86.8 pm… New
High School (11–12) · Lanthanoids and Actinoids (f-Block)A-Level, IB, NEETStemPy LabStemPy Lab
Medium
6.
Zirconium has a density of 6.51 g/cm³, a molar mass of 91.2 g/mol and an atomic radius of 160 pm… New
High School (11–12) · Lanthanoids and Actinoids (f-Block)A-Level, IB, NEETStemPy LabStemPy Lab
Medium
7.
The effective charge on the 5s and 5p electrons of La³⁺ is 11.25, and the radius of La³⁺ is 103.2… New
High School (11–12) · Lanthanoids and Actinoids (f-Block)A-Level, IB, NEETStemPy LabStemPy Lab
Medium
8.
Dysprosium has atomic number 66. Find the number of 4f electrons in Dy³⁺ and in Dy⁴⁺, and the… New
High School (11–12) · Lanthanoids and Actinoids (f-Block)A-Level, IB, NEETStemPy LabStemPy Lab
Hard
9.
A 25.00 mL sample of an iron(II) solution is titrated with ceric ammonium sulfate, 0.0500 mol/L… New
High School (11–12) · Lanthanoids and Actinoids (f-Block)StemPy LabStemPy Lab
Medium
10.
The standard potentials of two couples are E°(Sm³⁺/Sm²⁺) = -1.55 V and E°(Yb³⁺/Yb²⁺) = -1.05 V… New
High School (11–12) · Lanthanoids and Actinoids (f-Block)A-Level, IB, NEETStemPy LabStemPy Lab
Medium
11.
Terbium has atomic number 65. It forms a 3+ ion and also a 4+ ion… New
High School (11–12) · Lanthanoids and Actinoids (f-Block)A-Level, IBStemPy LabStemPy Lab
Easy