4 On the attached graph paper, plot electron affinity and Z* (calculated using Slater's rules) as a function of atomic number for the atoms from Li to Ne. In general, does Z* account for the variation in electron affinity? Why or why not? Are there any specific anomalies in the trend? If so, give an explanation.
 
Element
Electron Configuration
Z* (Calculated)
Electron Affinity (eV)
Li
(1s2)(2s1)
3 - [2(0.85)] = 1.30
0.618
Be
(1s2)(2s2)
4 - [2(0.85) + 1(0.35)] = 1.95
-0.5
B
(1s2)(2s22p1)
5 - [(2(0.85) + 2(0.35)] = 2.60
0.277
C
(1s2)(2s22p2)
6 - [2(0.85) + 3(0.35)] = 3.25
1.263
N
(1s2)(2s22p3)
7 - [2(0.85) + 4(0.35)] = 3.90
-0.07
O
(1s2)(2s22p4)
8 - [2(0.85) + 5(0.35)] = 4.55
1.461
F
(1s2)(2s22p5)
9 - [2(0.85) + 6(0.35)] = 5.20
3.399
Ne
(1s2)(2s22p6)
10 - [2(0.85) + 7(0.35)] = 5.85
-1.2

Generally, Z* and EA give the same trend. However, N and Ne are very low: N is half-filled and Ne is filled, neither want to remove this stability and add an electron. Li is a bit high perhaps, maybe because the product anion is a filled shell.