Which element from the following exhibits a common oxidation state of $+2$ only?
- A$Cu$
- B$Co$
- C$Sc$
- D$Zn$
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Similar Questions
Number of electrons present in $4f$ orbital of $Ho^{3+}$ ion is $.....$
(Given Atomic No. of $Ho=67$)
(Given Atomic No. of $Ho=67$)
Match the species in List-$I$ with their correct electronic configuration in List-$II$.
List-$I$ List-$II$ $(1) \ \text{Cr}$ $(A) \ [\text{Ar}] \ 3d^8 4s^0$ $(2) \ \text{Fe}^{2+}$ $(B) \ [\text{Ar}] \ 3d^{10} 4s^1$ $(3) \ \text{Ni}^{2+}$ $(C) \ [\text{Ar}] \ 3d^6 4s^0$ $(4) \ \text{Cu}$ $(D) \ [\text{Ar}] \ 3d^5 4s^1$ $(E) \ [\text{Ar}] \ 3d^6 4s^2$
| List-$I$ | List-$II$ |
| $(1) \ \text{Cr}$ | $(A) \ [\text{Ar}] \ 3d^8 4s^0$ |
| $(2) \ \text{Fe}^{2+}$ | $(B) \ [\text{Ar}] \ 3d^{10} 4s^1$ |
| $(3) \ \text{Ni}^{2+}$ | $(C) \ [\text{Ar}] \ 3d^6 4s^0$ |
| $(4) \ \text{Cu}$ | $(D) \ [\text{Ar}] \ 3d^5 4s^1$ |
| $(E) \ [\text{Ar}] \ 3d^6 4s^2$ |
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View SolutionWhich among the following elements has the lowest density and is the lightest?
Elements which generally exhibit multiple oxidation states and whose ions are usually coloured are
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