SOLUTIONS 40 points
(Grading - 6 points total: one for each correct configuration)
Each of these is an ion. In general, use the Aufbau table (see below) to determine the electron
configuration of the neutral atom, then add or remove electrons to reach the

SOLUTIONS
Total points: 54
QUESTION 1: Total 6 pts (a. 2 pts; b. 2 pts; c. 2 pts)
Remember the rules for Simple Cubic (all reflections allowed), BCC (h+k+l=even), and FCC (h, k, l all even
or all odd). The order of the reflections will be based on the low

Least covalent to most covalent will follow from largest to
smallest e-negativity difference. using table to left, that means:
(1) InN; (2) GaAs; (3) InAs
4s^2 3d^3

Total: 80 points
1) 9 points (1 for each sketch, correct method, and answer)
1
2
3.9) 3 points 1 for setup of equations, 1 for correct method, 1 for correct answer
3.16) 9 points 1 point for each of: setting up problem, work, correct solution
3
4
5
3.18)

Solutions Hw#2, MATRL 100B
The connections we were hoping to see on this assignment:
What do the differences in these surfaces represent?
-Noticing that the crystal structure of the material had the same symmetry as the modulus
plot. For example, wood