Certain Period 2 Elements Exhibit Behaviors Similar to Period 3

question 12

Multiple Choice

Certain Period 2 elements exhibit behaviors similar to Period 3 elements immediately below and to the right. One of these interesting diagonal relationships occurs between beryllium and aluminum. Which of the following is one of their differences?

• A)Some aluminum compounds and all beryllium compounds show significant covalent character in the gas phase.
• B)Beryllium forms bridge bonds in its hydrides while aluminum does not.
• C)Both form oxides that are impervious to reaction with water.
• D)The cations for both strongly polarize nearby electron clouds.
• E)Beryllium occurs in nature as the uncombined element, whereas aluminum does not.

---

Definitions:

Revenue

The total amount of money that a company receives from its activities, usually from the sale of goods and services to customers, before any expenses are subtracted.

Self-mutilation

The act of deliberately hurting one’s own body without intending to cause death, often as a way to cope with emotional pain.

Borderline Personality

A mental disorder characterized by unstable moods, behavior, and relationships, often resulting from a fear of abandonment.

Suicide

The act of intentionally causing one's own death, often resulting from feelings of hopelessness, depression, or distress.