Which group of elements on the periodic table has properties of both metals and nonmetals?

• A. Metalloids
• B. Noble gases
• C. Halogens
• D. Alkali metals

Answer: (A)

Verified step by step guidance

1. Understand the classification of elements on the periodic table: elements are broadly categorized as metals, nonmetals, and metalloids based on their physical and chemical properties.
2. Recall that metals are typically good conductors of heat and electricity, malleable, and ductile, while nonmetals are poor conductors and often brittle in solid form.
3. Identify that metalloids have properties intermediate between metals and nonmetals, meaning they can exhibit characteristics of both groups depending on the conditions.
4. Recognize that noble gases are nonmetals known for their inertness, halogens are reactive nonmetals, and alkali metals are highly reactive metals, so these groups do not have mixed properties.
5. Conclude that the group of elements with properties of both metals and nonmetals is the metalloids.