Free-Electron Theory of Metals: Silver Has a Fermi Level (Energy)

question 2

Multiple Choice

Free-electron theory of metals: Silver has a Fermi level (energy) of 5.5 eV. At 0 K, at what speed would the electrons be moving if they had kinetic energy equal to the Fermi energy? (This speed is known as the Fermi speed.) (m_el = 9.11 × 10^-31 kg, 1 eV = 1.60 × 10^-19 J, h = 6.626 × 10^-34 J ∙ s)

• A) 1400 km/s
• B) 1.0 km/s
• C) 2.2 km/s
• D) 1100 km/s
• E) 3.5 km/s

---

Definitions:

Disclosure

The act of making something known or public, particularly information that was previously confidential or secret, in the interest of transparency.

Private Information

Data or details that are confidential and not intended for public knowledge or sharing, concerning an individual or organization.

Mental Anguish

Deep emotional suffering or distress, often as a result of experiences that are traumatic or extremely upsetting.

Intrusion

The intentional disturbance, physically or otherwise, upon the solitude or seclusion of another that causes offense, mental anguish, or suffering.