Consider the surface of a si wafer that has a (100) plane: (12 points) 1.1. sketch the placement of si atoms on the surface of the wafer. 1.2. determine the number of atoms per cm2 at the surface of the wafer. 1.3. repeat part a., this time taking the surface of the si wafer to be (110). 1.4. repeat part b., this time taking the surface of the si wafer to be (110)

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o