Which of the Following Elements Are Fifth Period Semimetals

question 145

Multiple Choice

Which of the following elements are fifth period semimetals?

• A)As and Sb
• B)Ge and As
• C)Sb and Te
• D)Po and At
• E)none of the above

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Definitions:

Tracheal Tubes

A system of small tubes in insects that carries oxygen directly to tissues and organs.

Exoskeleton

A rigid external covering that supports and protects the bodies of certain animals, such as insects, crustaceans, and some mollusks.

Echinodermata

A phylum of marine animals including sea stars, sea urchins, and sea cucumbers, characterized by radial symmetry and a unique water vascular system.

Echinoderms

A phylum of marine animals that includes starfish, sea urchins, and sea cucumbers, characterized by radial symmetry and a unique water vascular system.