Question

write all Quantum numbers of 10th electron of sodium atom

Answer 1

Answer:

3, 0, 0, +12

Explanation:

Sodium (11Na) electronic configuration:

1s2.2s2.2p6.3s1

For 10th electron (marked red)

n = 3..[∵It is in 3rdshell]l = 0..[∵It is in s-orbital]m = 0.[∵l = 0]s=+12.[∵Convention]

Answer 2

Sodium is having atomic number 11

Quantum numbers of 10th electron of sodium atom is  n=3, l=0, m=0, and s= +1/2 or−1/2

Explanation:

There are four quantum numbers for an atom principal quantum number (n), azimuthal quantum number (l), magnetic moment ( m), and spin quantum number (s).

Sodium atom= 11.

Electronic configuration is as follows:

Na = $1s2,2s2,2p6,3s1$

(1) Principal quantum number (n):

This quantum number describes the number of shells  present in the atom.Here the principal quantum number is in the third shell, so n = 3

(2) Azimuthal quantum number (l):

It is also known as orbital momentum quantum number denoted by  (l) which determines the shape of the subshell.

The value of ‘l’  is less than the principal quantum number(n−1).

For sodium, (n = 3)therefore the ‘l’ value is calculated as:

Therefore, the azimuthal quantum number (l) for the third shell of sodium atom is 0, 1, 2. representing s,p and d respectively

(3) Magnetic quantum number (m) :

This quantum number denotes the orbitals and their orientation in the subshell. The value of m  depends on the azimuthal quantum number. For a  ‘l’ value the  (m) values will be from−l to +l.

The (m) values for the third shell of sodium are:

m = −2 , −1 , 0 , +1 , +2

For (n = 3) the magnetic quantum numbers are: −2 , −1 , 0 , +1 , +2

sodium has  l=0 , thus the magnetic quantum number for 3s an electron is m= Na= 0

(4) Electron spin quantum number (s):

The value of s shows the direction of the electron spin.

Here the value of spin s is +1/2 or −1/2

So, the quantum numbers for the electron of sodium atom having the highest energy are 3, 0, 0, and +1/2 or−1/2

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