MCQ
The $CORRECT$ ionisation energy order is
- ✓$Zn^+ > Ca^+ > Cr^+$
- B$Co^{2+} > Mn^{2+} > Cr^{2+}$
- C$Mn^{2+} > Ni^{2+} > Ca^{2+}$
- D$Zn^+ > Cu^+ > Ni^+$
✓
Answer
Correct option: A.
$Zn^+ > Ca^+ > Cr^+$
a
$\mathrm{Zn}=[\mathrm{Ar}] 3 \mathrm{d}^{10} 4 \mathrm{s}^{2} \Rightarrow \mathrm{Zn}^{+} \Rightarrow[\mathrm{Ar}] 3 \mathrm{d}^{10} 4 \mathrm{s}^{1}$
$\mathrm{Zn}=[\mathrm{Ar}] 3 \mathrm{d}^{10} 4 \mathrm{s}^{2} \Rightarrow \mathrm{Zn}^{+} \Rightarrow[\mathrm{Ar}] 3 \mathrm{d}^{10} 4 \mathrm{s}^{1}$
$\mathrm{Ca}=[\mathrm{Ar}] 4 \mathrm{s}^{2} \Rightarrow \mathrm{Ca}^{+} \Rightarrow[\mathrm{Ar}] 4 \mathrm{s}^{1}$
$\mathrm{Cr}=[\mathrm{Ar}] 3 \mathrm{d}^{5} 4 \mathrm{s}^{1} \Rightarrow \mathrm{Cr}^{+} \Rightarrow[\mathrm{Ar}] 3 \mathrm{d}^{5}$
$\mathrm{Cu}=[\mathrm{Ar}] 3 \mathrm{d}^{10} 4 \mathrm{s}^{1} \Rightarrow \mathrm{Cu}^{+} \Rightarrow[\mathrm{Ar}] 3 \mathrm{d}^{10}$
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