Which of the following arrangements shows the correct order of decreasing number of unpaired electrons.

Question

Which of the following arrangements shows the correct order of decreasing number of unpaired electrons. (A) N > Al > O > Ca (B) N > O > Al > Ca (C) O > N > Al > Ca (D) O > N > Ca > Al

Tardigrade Admin · Accepted Answer

Element Electronic configuration Number of unpaired electrons N 1 s2 2 s2 2 p3 3 O 1 s2 2 s2 2 p4 2 Al [ Ne ] 3 s2 3 p1 1 Ca [ Ar ] 4 s2 0

Element	Electronic configuration	Number of unpaired electrons
$N$	$1 s^{2} 2 s^{2} 2 p^{3}$	3
$O$	$1 s^{2} 2 s^{2} 2 p^{4}$	2
$A l$	$[N e] 3 s^{2} 3 p^{1}$	1
$C a$	$[A r] 4 s^{2}$	0

Q. Which of the following arrangements shows the correct order of decreasing number of unpaired electrons.

$N > A l > O > C a$

$N > O > A l > C a$

$O > N > A l > C a$

$O > N > C a > A l$

Element Electronic configuration Number of unpaired electrons

$N$ $1 s^{2} 2 s^{2} 2 p^{3}$ 3

$O$ $1 s^{2} 2 s^{2} 2 p^{4}$ 2

$A l$ $[N e] 3 s^{2} 3 p^{1}$ 1

$C a$ $[A r] 4 s^{2}$ 0

Q. Which of the following arrangements shows the correct order of decreasing number of unpaired electrons.

N>Al>O>Ca

N>O>Al>Ca

O>N>Al>Ca

O>N>Ca>Al

Element Electronic configuration Number of unpaired electrons N 1s22s22p3 3 O 1s22s22p4 2 Al [Ne]3s23p1 1 Ca [Ar]4s2 0

$N > A l > O > C a$

$N > O > A l > C a$

$O > N > A l > C a$

$O > N > C a > A l$

Element Electronic configuration Number of unpaired electrons

$N$ $1 s^{2} 2 s^{2} 2 p^{3}$ 3

$O$ $1 s^{2} 2 s^{2} 2 p^{4}$ 2

$A l$ $[N e] 3 s^{2} 3 p^{1}$ 1

$C a$ $[A r] 4 s^{2}$ 0