Which of the following quantum numbers are correct for the outermost electron of sodium atom?

Question

Which of the following quantum numbers are correct for the outermost electron of sodium atom? (A) n = 4, l = 0, m = 0, s = +1/2 (B) n = 3, l = 0, m = 0, s = -1/2 (C) n = 3, l = 1, m = +1, s = +1/2 (D) n = 3, l = 2, m = -1, s = -1/2

Tardigrade Admin · Accepted Answer

For sodium atom: atomic number =11 thus its electronic configuration: 1 s2 2 s2 2 p6 3 s1 Outer most electron is in 3 s orbital and has quantum numbers as: n =3, l = s =0, m l =0, m s =+1 / 2 or -1 / 2

Q. Which of the following quantum numbers are correct for the outermost electron of sodium atom?

$n = 4$ , $l = 0$ , $m = 0$ , $s = + 1/2$

$n = 3$ , $l = 0$ , $m = 0$ , $s = - 1/2$

$n = 3$ , $l = 1$ , $m = + 1$ , $s = + 1/2$

$n = 3$ , $l = 2$ , $m = - 1$ , $s = - 1/2$

For sodium atom: atomic number $= 11$
thus its electronic configuration: $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$
Outer most electron is in $3 s$ orbital and has quantum numbers as:
$n = 3, l = s = 0, m_{l} = 0, m_{s} = + 1/2$ or $- 1/2$

Q. Which of the following quantum numbers are correct for the outermost electron of sodium atom?

n=4, l=0, m=0, s=+1/2

n=3, l=0, m=0, s=−1/2

n=3, l=1, m=+1, s=+1/2

n=3, l=2, m=−1, s=−1/2

For sodium atom: atomic number =11 thus its electronic configuration: 1s22s22p63s1 Outer most electron is in 3s orbital and has quantum numbers as: n=3,l=s=0,ml​=0,ms​=+1/2 or −1/2

$n = 4$ , $l = 0$ , $m = 0$ , $s = + 1/2$

$n = 3$ , $l = 0$ , $m = 0$ , $s = - 1/2$

$n = 3$ , $l = 1$ , $m = + 1$ , $s = + 1/2$

$n = 3$ , $l = 2$ , $m = - 1$ , $s = - 1/2$

For sodium atom: atomic number $= 11$
thus its electronic configuration: $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$
Outer most electron is in $3 s$ orbital and has quantum numbers as:
$n = 3, l = s = 0, m_{l} = 0, m_{s} = + 1/2$ or $- 1/2$