Element

Per. Table

Period, n

Max. Ion Oxid.

Number^a

Electron Affinity

β (eV)

Oxid. Pot.^b

E˚ (V)

Conduct.

σ (S∙m⁻¹)

Cu

4

2+

1.226

−0.521

5.90 × 10⁷

Ag

5

1+

1.303

−0.799

6.30 × 10⁷

Au

6

0

2.309

−1.68

4.10 × 10⁷