If the Electrostatic Potential Energy of Na⁺ and F^- Ions $\times$

question 30

Multiple Choice

If the electrostatic potential energy of Na⁺ and F^- ions at their equilibrium separation (with U = 0 at infinite separation) is -1.19 $\times$ 10^-18 J,then their equilibrium separation must be approximately

• A)2.14 nm
• B)0.193 nm
• C)0.876 nm
• D)1.32 nm
• E)0.374 nm

---

Definitions:

Marginal Cost

The cost added by producing one additional unit of a good or service, crucial for decision-making in business.

Advertising Revenue

Income that a company receives from advertisers for displaying or running their advertisements.

Cournot Model

An economic model used to describe an industry structure in which firms compete on the quantity of output they will produce, which they decide on at the same time.

Cournot Equilibrium

A situation in oligopoly markets where each firm chooses the quantity to produce to maximize its profit, assuming the quantities of its rivals are fixed.