In the fourth period of the periodic table,how many elements have one or more $4d$ electrons?
- A$2$
- B$18$
- C$0$
- D$6$
Explore More
Similar Questions
What will be the $IUPAC$ symbol and name for the element with atomic number $123$?
An element having atomic number $120$ has not yet been discovered. What will be its position in the long form of the periodic table?
Medium
View SolutionThe long form of the periodic table is based on:
Easy
View SolutionMatch the items in List-$A$ with the items in List-$B$ and select the correct option.
List-$A$ List-$B$ $(1)$ Atomic number: $101$ $(A)$ $IUPAC$ symbol: $Rf$ $(2)$ Atomic number: $104$ $(B)$ $IUPAC$ symbol: $No$ $(3)$ Atomic number: $116$ $(C)$ $IUPAC$ name: Mendelevium $(4)$ Atomic number: $109$ $(D)$ Name: $Unnilennium$ $(E)$ Symbol: $Lv$ $(F)$ $IUPAC$ name: $Meitnerium$
| List-$A$ | List-$B$ |
| $(1)$ Atomic number: $101$ | $(A)$ $IUPAC$ symbol: $Rf$ |
| $(2)$ Atomic number: $104$ | $(B)$ $IUPAC$ symbol: $No$ |
| $(3)$ Atomic number: $116$ | $(C)$ $IUPAC$ name: Mendelevium |
| $(4)$ Atomic number: $109$ | $(D)$ Name: $Unnilennium$ |
| $(E)$ Symbol: $Lv$ | |
| $(F)$ $IUPAC$ name: $Meitnerium$ |
Medium
View SolutionWhere is helium placed in the periodic table and why?
Easy
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo