Question:
The electronic configurations of bivalent europium and trivalent cerium are :
(atomic number: $Xe = 54, Ce =58, Eu ??63$)
The electronic configurations of bivalent europium and trivalent cerium are :
(atomic number: $Xe = 54, Ce =58, Eu ??63$)
Updated On: Sep 30, 2024
- $[Xe] 4f^7$ and $[Xe] 4f^1$
- $[Xe] 4f^7 \,6s^2$ and $[Xe] 4f^2\,6s^2$
- $[Xe] 4f^2$ and $[Xe] 4f^7$
- $[Xe] 4f^4$ and $[Xe] 4f^9$
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
$Eu_{63} \Rightarrow\, \left[Xe\right] 4 f^{7} 5 d^{\circ} 6s^{2}$
$Eu^{2\oplus} \Rightarrow \left[Xe\right]4f^{7}$
$Ce_{58} \Rightarrow\left[Xe\right]4 f^{1} 5d^{1} 6s^{2}$
$Ce^{3\oplus} \Rightarrow\, \left[Xe\right]4f^{1}$
Was this answer helpful?
0
0
Top Questions on Some Applications of d- and f-Block Elements
- Why is \( Cr^{2+} \) strongly reducing while \( Mn^{3+} \) is strongly oxidizing?
- CBSE CLASS XII - 2025
- Chemistry
- Some Applications of d- and f-Block Elements
- Write two consequences of lanthanide contraction.
- CBSE CLASS XII - 2025
- Chemistry
- Some Applications of d- and f-Block Elements
- Which element of the 3d series has the lowest enthalpy of atomisation and why?
- CBSE CLASS XII - 2025
- Chemistry
- Some Applications of d- and f-Block Elements
- When \( \text{FeCr}_2\text{O}_4 \) is fused with \( \text{Na}_2\text{CO}_3 \) in the presence of air, it gives a yellow solution of compound (A). Compound (A) on acidification gives compound (B). Compound (B) on reaction with KCl forms an orange-colored compound (C). An acidified solution of compound (C) oxidizes \( \text{Na}_2\text{SO}_3 \) to (D). Identify (A), (B), (C), and (D).
- CBSE CLASS XII - 2025
- Chemistry
- Some Applications of d- and f-Block Elements
- The element having \([Ar]3d^{10}4s^1\) electronic configuration is
- CBSE CLASS XII - 2025
- Chemistry
- Some Applications of d- and f-Block Elements
View More Questions
Questions Asked in JEE Main exam
- A coin is tossed three times. Let X denote the number of times a tail follows a head. If \(\mu\) and \(\sigma^2\) denote the mean and variance of X, then the value of \(64(\mu + \sigma^2)\) is:
- JEE Main - 2025
- Probability and Statistics
- Let \( f: (0, \infty) \to \mathbb{R} \) be a function which is differentiable at all points of its domain and satisfies the condition \( x^2 f'(x) = 2f(x) + 3 \), with \( f(1) = 4 \). Then \( 2f(2) \) is equal to:
- JEE Main - 2025
- Probability and Statistics
- If \( \sin x + \sin^2 x = 1 \), \( x \in \left(0, \frac{\pi}{2} \right) \), then the expression \[ (\cos^2 x + \tan^2 x) + 3(\cos^4 x + \tan^4 x + \cos^4 x + \tan^4 x) + (\cos^6 x + \tan^6 x) \] is equal to:
- JEE Main - 2025
- Trigonometric Identities
- The sum of the squares of all the roots of the equation \( x^2 + [2x - 3] - 4 = 0 \) is:
- JEE Main - 2025
- Quadratic Equations
- Let ABCD be a trapezium whose vertices lie on the parabola \( y^2 = 4x \). Let the sides AD and BC of the trapezium be parallel to the y-axis. If the diagonal AC is of length \( \frac{25}{4} \) and it passes through the point \( (1, 0) \), then the area of ABCD is:
- JEE Main - 2025
- Coordinate Geometry
View More Questions