Iron Has Four Naturally Occurring Isotopes, One of Which Is

question 36

Multiple Choice

Iron has four naturally occurring isotopes, one of which is far more abundant that the others.Iron has an average atomic mass of 55.845 amu.Which isotope is most abundant?

• A)⁵⁴Fe, 53.9396 amu
• B)⁵⁶Fe, 55.9349 amu
• C)⁵⁷Fe, 56.9354 amu
• D)⁵⁸Fe, 57.9333 amu
• E)⁷⁰Zn, 69.9253 amu

---

Definitions:

ATC

Average Total Cost, the per unit cost of production that includes all fixed and variable costs.

MR

Marginal Revenue, the additional income earned from selling one more unit of a good or service.

Economic Profit

The excess of total revenue over the complete aggregation of both transparent and hidden costs.

Marginal Revenue

The supplementary income a company accrues from the sale of one additional unit of a product or service.