- 1(current)
Q. No.Gadolinium belongs to 4f series. It’s atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?
| 1. | \(\text{ [Xe] } 4f^8 6 d^2\) | 2. | \(\text { [Xe]}4 f^9 5 s^1\) |
| 3. | \(\text { [Xe] } 4f^7 5 d^1 6 s^2\) | 4. | \(\text { [Xe]} 4f^6 5 d^2 6 s^2\) |
Subtopic: f-Block Elements- Properties & Uses |
91%
Level 1: 80%+
NEET - 2015
Hints
A pair among the following have nearly the same atomic radii:
(Numbers in the parenthesis are atomic numbers).
| 1. | Ti (22) and Zr (40) | 2. | Zr (40) and Nb (41) |
| 3. | Zr (40) and Hf (72) | 4. | Zr (40) and Ta (73) |
Subtopic: f-Block Elements- Properties & Uses | Lanthanoid & Actinoids Contraction |
91%
Level 1: 80%+
NEET - 2015
Hints
Diamagnetic lanthanoid ion among the following is:
(At nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)
1. Sm2+
2. Eu2+
3. Yb2+
4. Ce2+
(At nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)
1. Sm2+
2. Eu2+
3. Yb2+
4. Ce2+
Subtopic: f-Block Elements- Properties & Uses |
67%
Level 2: 60%+
AIPMT - 2013
Hints
The outer electronic configuration of Gd:
( At. No. 64)
1. 4f5 5d4 6s1
2. 4f7 5d1 6s2
3. 4f3 5d5 6s2
4. 4f4 5d5 6s1
( At. No. 64)
1. 4f5 5d4 6s1
2. 4f7 5d1 6s2
3. 4f3 5d5 6s2
4. 4f4 5d5 6s1
Subtopic: f-Block Elements- Properties & Uses |
90%
Level 1: 80%+
NEET - 2013
Hints
Actinoids exhibit more number of oxidation states than lanthanoids. It is because of:
| 1. | The greater metallic character of the lanthanoids than that of the corresponding actinoids. |
| 2. | More energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals. |
| 3. | The lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals. |
| 4. | More active nature of the actinoids. |
Subtopic: d-Block Elements- Properties & Uses | f-Block Elements- Properties & Uses | Lanthanoid & Actinoids Contraction |
80%
Level 1: 80%+
AIPMT - 2011
Hints
Subtopic: f-Block Elements- Properties & Uses |
91%
Level 1: 80%+
AIPMT - 2010
Hints
Links
Actinoids exhibit more oxidation states than lanthanoids. The main reason for this is:
| 1. | More energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals |
| 2. | Greater metallic character of the lanthanoids than that of the corresponding actinoids |
| 3. | The lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals |
| 4. | More active nature of the actinoids |
Subtopic: f-Block Elements- Properties & Uses |
69%
Level 2: 60%+
AIPMT - 2006
Hints
- 1(current)
Q. No.
© 2026 GoodEd Technologies Pvt. Ltd.