Which of the following ions has electronic configuration $[Ar]3d^6$ ?
(At. nos. $Mn = 25, Fe = 26, Co = 27, Ni = 28$)
(At. nos. $Mn = 25, Fe = 26, Co = 27, Ni = 28$)
- A$Ni^{3+}$
- B$Mn^{3+}$
- C$Fe^{3+}$
- D$Co^{3+}$
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Match the following atoms/ions with their correct electronic configurations:
Atom/Ion Electronic Configuration $(1) \ Cu$ $(A) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^{10}$ $(2) \ Cu^{2+}$ $(B) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^{10}, 4s^2$ $(3) \ Zn^{2+}$ $(C) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^{10}, 4s^1$ $(4) \ Cr^{3+}$ $(D) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^9$ $(E) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^3$
| Atom/Ion | Electronic Configuration |
| $(1) \ Cu$ | $(A) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^{10}$ |
| $(2) \ Cu^{2+}$ | $(B) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^{10}, 4s^2$ |
| $(3) \ Zn^{2+}$ | $(C) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^{10}, 4s^1$ |
| $(4) \ Cr^{3+}$ | $(D) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^9$ |
| $(E) 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 3d^3$ |
Medium
View SolutionThe correct order of density for the $3d$ series elements is:
Easy
View SolutionIn the series $Sc (Z=21)$ to $Zn (Z=30)$,the enthalpy of atomisation of zinc is the lowest,i.e.,$126 \ kJ \ mol^{-1}$. Why?
Medium
View SolutionThe calculated magnetic moment (in Bohr magnetons) of $Cu^{2+}$ ion is:
The components of German silver alloy are:
Easy
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