For Each of the Elements Below, There Are Only Two

question 62

Multiple Choice

For each of the elements below, there are only two naturally occurring isotopes. Using information in your periodic table, identify the pair in which the lighter isotope is the more abundant one.

• A)(⁶Li and ⁷Li)
• B)(⁷⁹Br and ⁸¹Br)
• C)(¹⁰B and ¹¹B)
• D)(¹⁹¹Ir and ¹⁹³Ir)
• E)(⁵⁰V and ⁵¹V)

---

Definitions:

Conversion Costs

Costs related to turning raw materials into finished goods, typically including direct labor and manufacturing overhead.

Weighted-Average Method

A method of inventory costing or process costing that averages the costs of all goods available for sale or production, assigning an average cost to each unit.

Process Costing System

An accounting system used to track and allocate costs of production to individual units of output in industries where production is continuous and similar items are produced.

Conversion Costs

The costs associated with converting raw materials into finished products, typically including labor and overhead expenses.