Quantum number is address of an electron in amy atom . They are of four types :

Principal quantum number (n)

Azimuthal quantum number (l)

(c ) Magnetic quantum number (m)

(d) spin quantum number (s)

prinicial quantum (n) :

(a) Denoted by n.

(b) it can have any positive interger values like 1,2,3,...........

Azimuthal quantum number or angulart momentum quantum number or subsidiary quantum number (l)

(a) Denoted by l.

(B) l can have any value from 0,1,2,... to (n-1) for each value of n

`{:( "value of l",0,1,2,3,4,5),("Notation of subshell",s,p,d,f,g,h):}` MAgnetic quantum number (m or `M_(l)`): (a) Denoted by `m or m_(1)`

(B) it can have any value from -l to +l inckluding 0, for each value of l.

Spin quantum number (s or `m_(s)`) :

The value of s is `+(1)/(2) and -(1)/(2)` which two quantum spin states .

Maximum electrons in n= 3 in Fe atom are :

A. 6

B. 12

C. 14

D. 8