Select correct order of $I E_{3}$ :

O > C > N > B

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B > C > N > O

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O > N > C > B

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O > C > B > N

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Solution

The correct option is A O > C > N > B
$B^{2 +} = {1 s}^{2} {2 s}^{1} {2 p}^{0}$
$C^{2 +} = {1 s}^{2} {2 s}^{2} {2 p}^{0}$
$O^{2 +} = {1 s}^{2} {2 s}^{2} {2 p}^{2}$
$N^{2 +} = {1 s}^{2} {2 s}^{2} {2 p}^{1}$
$∴$ $I E = O^{2 +} > C^{2 +} > N^{2 +} > B^{2 +}$
or $,$ ${I E}_{3} = O > C > N > B$

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Select correct order of IE3 :

The correct option is A O > C > N > BB2+=1s22s12p0C2+=1s22s22p0O2+=1s22s22p2N2+=1s22s22p1∴ IE=O2+>C2+>N2+>B2+or, IE3=O>C>N>B

Select correct order of $I E_{3}$ :

The correct option is A O > C > N > B
$B^{2 +} = {1 s}^{2} {2 s}^{1} {2 p}^{0}$
$C^{2 +} = {1 s}^{2} {2 s}^{2} {2 p}^{0}$
$O^{2 +} = {1 s}^{2} {2 s}^{2} {2 p}^{2}$
$N^{2 +} = {1 s}^{2} {2 s}^{2} {2 p}^{1}$
$∴$ $I E = O^{2 +} > C^{2 +} > N^{2 +} > B^{2 +}$
or $,$ ${I E}_{3} = O > C > N > B$