Silver
9.2
14.0
0.021
0.032
1.4
3.8344
Gold
9.1
13.8
0.072
0.11
1.4
11.575
Copper
8.8
13.4
0.092
0.14
1.6
12.076
Aluminum
15.1
22.9
0.605
0.92
2.0
1.8614
 
Table 8:  Plasma frequency