This action cannot be undone. This will permanently delete All Practiced Questions.
Only bookmarked questions of selected question set or default questions are shown here. Click Here to view all bookmarked questions of the chapter
Which of the following statements correctly describes lanthanoids?
| 1. | 14 elements in the seventh period (atomic no. = 90 to 103) that are filling 5f sublevel. |
| 2. | 14 elements in the sixth period (atomic no. 58 to 71) that are filling 4f sublevel |
| 3. | 14 elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sublevel |
| 4. | 14 elements in the sixth period (atomic no. 90 to 103) that are filling 4f sublevel |
Other Reason

© 2026 GoodEd Technologies Pvt. Ltd.