MCQ
Correct configuration of $F{e^{ + 3}}$ $[26] $ is
- ✓$1{s^2},2{s^2}2{p^6},3{s^2}3{p^6}3{d^5}$
- B$1{s^2},2{s^2}s{p^6},3{s^2}3{p^6}3{d^3},4{s^2}$
- C$1{s^2},2{s^2}2{p^6},3{s^2}3{p^6}3{d^6},4{s^2}$
- D$1{s^2},2{s^2}2{p^6},3{s^2}3{p^6}3{d^5},4{s^1}$
✓
Answer
Correct option: A.
$1{s^2},2{s^2}2{p^6},3{s^2}3{p^6}3{d^5}$
a
It’s Obvious
It’s Obvious
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The final product $\mathrm{A}$, formed in the following reaction sequence is:
→$\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\text { (iii) } \mathrm{HBr}{(iv) \mathrm{Mg}, ether, then \mathrm{HCHO} / \mathrm{H}_3 \mathrm{O}^{+}}]{{(i)BH_3}{\text { (ii) } \mathrm{H}_2 \mathrm{O}_2,{ }^{\text {(-) }} \mathrm{OH}}} \mathrm{A}$
Gastrointestinal symptoms are the most common side effects when we take excess of:
If solubility product of $Z{r_3}{\left( {P{O_4}} \right)_4}$ is denoted by $K_{SP}$ and its molar solubility is denoted by $S$, then which of the following relation between $S$ and $K_{SP}$ is correct?
→The $IUPAC$ name of following compound is
→$IUPAC$ name of $C{H_3} - C{H_2} - \mathop {\mathop {CH - N{H_2}}\limits_{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits_{C{H_3}\,\,\,\,\,\,\,\,\,\,\,} $ is
→According to Bohr’s principle, the relation between principle quantum number $(n)$ and radius of orbit is
→In an oxidation process, oxidation number
The species formed on fluorination of phosphorus pentachloride in a polar organic solvent are
Which of the following is not an endothermic reaction
Incorrect set is
→$(a)$ Ionisation energy $(Na < Li < B < Be)$
$(b)$ Electron affinity $(N < P < O < S)$
$(c)$ Electron negativity $(S < O < Cl < F)$
$(d)$ Atomic radii $(F < N < O < Na)$