Calcium Sulfide Has a Face-Centered Cubic Unit Cell with Calcium

question 43

Multiple Choice

Calcium sulfide has a face-centered cubic unit cell with calcium ions in octahedral holes.How many ions of each element are contained in each unit cell?

• A) 1 calcium ion; 1 sulfide ion
• B) 2 calcium ions; 2 sulfide ions
• C) 2 calcium ions; 4 sulfide ions
• D) 4 calcium ions; 2 sulfide ions
• E) 4 calcium ions; 4 sulfide ions

---

Definitions:

Unemployment

The situation of being without a job, while actively looking for one.

Unemployment Insurance

A social welfare program that provides temporary financial assistance to workers who have lost their jobs through no fault of their own.

Minimum-Wage Law

Legislation that establishes the minimum amount per hour that employers must pay their employees.

Labor Shortage

A condition in which employers do not have enough employees to fill the available job vacancies.