Questions based

Question 1

Cohesive Energy Equation at 0 temp and pressure

Answer 1

-8.5Nepsilon

Question 2

Equillibrium seperation equation

Answer 2

R0/Sigma = 1.09
Sigma = Radius of repulsove core

Question 3

Cohesive Energy comparative for metallic bonding

Answer 3

Cohesive Energy=Energy with one electron per box−Energy with all electrons in one large box

Question 4

In what structure would C60 with van der waals interactions crystallise

Answer 4

in FCC structure

Question 5

Cohesive energy for ionic

Answer 5

U(R) = (-alpha(q^2))/(8piE0R0))*(1-1/12)

Question 6

Lattice formation distance equation

Answer 6

d = 2pi/ |Ghkl|

d = a/ sqrt(h^2+j^2 +K^2)

Question 7

Max wavelngthnin FCC

Answer 7

2d

Question 8

Reciprocal lattice vector equation

Answer 8

a* = [2pi(bxc)] /a.(bxc)

Question 9

FCC recipocal relation

Answer 9

a* = 1/2(a(j+k)
…

Question 10

Electron energy equation

Answer 10

E = (hbar c k)/2pi

Question 11

Wavevector energy equation

Answer 11

E= hck/2pi

Question 12

Free electron density

Answer 12

[(No ar=tims in a^3)(valancy)]/a^3

Question 13

Magnitude if fermi wave vector

Answer 13

kf = (3npi^2)^1/3

n= free electron density