Write four quantum numbers for (a)`1s^1` (b)`2p^1` (c)`3d^1` (d)`4f^1`

In a sphere the number of faces is 1 (b) 2 (c) 3 (d) 4

Q .Which of the following electron configurations is correct for nickel (atomic number "28" )? a) 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(1)3d^(9) (b) 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d^(8) (c) 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(0)3d^(10)

What are the numbers of nodes present in : (a) 1 s, (b) 2s, (c ) 2 p, (d) 3 p, orbitial s?

Using the s,p,d notations, describe the orbital with the following quantum numbers : (a) n = 1, l = 0 " " (b) n = 3, l = 2 (c ) n = 3, l = 1 " " (d) n = 2, l = 1 (e ) n = 4, l = 3 " " (f) n = 4, l = 2 .

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 number of electrons in Ne atom with s=-(1)/(2) is :

Magnetic quantum number for the last electron in sodium is: a)3 b)1 c)2 d)Zero

If a,b,c,d are four distinct numbers in A.P then show that (1)/(a)+(1)/(d)>(1)/(b)+(1)/(c)>(4)/(a+d)

Of f(x)=p x^2+q x+r is a quadratic expression such that [a^2a1b^2b1c^2c1][f(0)f(1)f(-1)]=[2a+1 2b+1 2c+1] for three unequal numbers a ,b ,c then p=3/2 (b) q=-1/2 (c) r=1 (d) p+q+r=2

The solution of the equation p/2 + 1 = 3 is (a) 1 (b) 2 (c) 3 (d) 4