The four quantum number for the valence shell electron or last electron of sodium (Z = 11) is
(A) n= 2, l= 1, m= -1, s= -1/2
(B) n= 3, l= 0, m= 0, s= +1/2
(C) n= 3, l= 2, m= -2, s= -1/2
(D) n= 3, l= 2, m= 2, s= +1/2

Which of the following sets of quantum numbers represents the highest energy of an electron? (A) n = 5, l = 0, m = 0, s = +1/2 (B) n = 6, l = 2, m = 1, s = +1/2 (C) n = 5, l = 1, m = 1, s = -1/2 (D) n = 4, l = 1, m = 0 s = -1/2

Among the following sets of quantum number, state which are possible. Explain why the other are not permitted? (a) n=1, l=0, m=-1, s=+1/2 (b) n=, l=0, m=0, s=-1/2 (c ) n=2, l=3, m=0, s=-1/2 (c ) n=2, l=3, m=0, s=+1/2 (d) n=3, l=1, m=1, s=-1/2 (e ) n=0, l=0, m=0, s=+1/2 (f ) n=2, l=0, m=0, s=-1/2

Designate the electrons having the following sets of quantum numbers, (a) n=2, l=0, m =0, s=+1/2 (b) n=3, l=1, m=+1, s=+1/2 (c ) n=l, l=0, m=0, s=-1/2

Designate the electrons with the following sets of quantum numbers : (a) n=3, l=0, m=0, s=-1/2 (b) n=2, l=1, m=+1, s=+1/2 (c ) n=5, l=0, m=0, s=+1/2

From the following sets quantum number state which are possible. Explain why the other are not permitted ? a. n = 0, l = 0, m= 0, s = + 1//2 b. n = 1, l = 0, m= 0, s = - 1//2 c. n = 1, l = 1, m= 0, s = + 1//2 d. n = 1, l = 0, m= +1, s = + 1//2 e. n = 0, l = 1, m= -1, s = - 1//2 f. n = 2, l = 2, m= 0, s = - 1//2 g. n = 2, l = 1, m= 0, s = - 1//2

Which of the following sets of quantum numbers do not belong to 2p subshell? (i) n=2, l=1, m=+1, s=+1/2 (ii) n=2, l=0, m=0, s=-1/2 (iii) n=1, l=1, m=0, s=+1/2

The decrerasing order of energy for the electrons represented by the following sets of quantum number is : 1. n = 4,l = 0,m = 0,s = +- 1//2 2. n = 3,l = 1,m = 1,s = - 1//2 3. n = 3,l = 2,m = 0,s = + 1//2 4. n = 3,l = 0,m = 0,s = - 1//2

Which of the following sets of quantum number is INCORRECT? (I) n=3, l = 4, m=0, s=+(1)/(2) (II) n=3, l = 3, m = +3, s=+(1)/(2) (III) n=6, l = 0, m=+1, s=-(1)/(2) (IV) n=4, l = 2, m = +2, s=0

The quantum number of electrons are given below: Arrange then in order of increasing energies a. n= 4,l= 2,m_(1)= -2, m_(s)= -(1)/(2) b. n= 3,l= 2,m_(1) = 1, m_(s)= +(1)/(2) c. n= 4,l= 1,m_(1) = 0, m_(s)= +(1)/(2) e.n= 3,l= 2,m_(1)= -2, m_(s)= +(1)/(2) f. n= 4,l= 1,m_(1) = +1, m_(s)= +(1)/(2)

The values of four quantum number of valence electron of an element are n = 4, l = 0, m = 0 and s=+(1)/(2) . The element is: