Which of the following is characteristic of a metal?

• A. Good electrical conductivity
• B. Brittle in solid state
• C. Forms acidic oxides
• D. Poor thermal conductivity

Answer: (A)

Verified step by step guidance

1. Recall the general physical and chemical properties of metals, which help distinguish them from nonmetals and metalloids.
2. Understand that metals typically have high electrical conductivity because they have free-moving valence electrons that allow electric current to flow easily.
3. Note that metals are usually malleable and ductile, meaning they can be shaped or stretched without breaking, so they are not brittle in the solid state.
4. Recognize that metals tend to form basic or amphoteric oxides rather than acidic oxides, which are more characteristic of nonmetals.
5. Remember that metals generally have good thermal conductivity, allowing heat to pass through them efficiently.