Which of the following statements best describes the physical properties and importance of gold (Au)?

• A. Gold is a hard, brittle, and magnetic metal with a dull gray color, commonly used in construction materials.
• B. Gold is a transparent, nonmetallic element with poor electrical conductivity, mainly used as a food additive.
• C. Gold is a soft, malleable, and ductile metal with a bright yellow color, high density, and excellent electrical conductivity, making it valuable for jewelry and electronics.
• D. Gold is a lightweight, reactive metal that readily corrodes in air and water, limiting its industrial applications.

Answer: (C)

Verified step by step guidance

1. Step 1: Identify the key physical properties of gold (Au) by recalling its position in the periodic table and common characteristics of transition metals.
2. Step 2: Recall that gold is known for being soft, malleable (can be hammered into thin sheets), and ductile (can be drawn into wires), which are typical metallic properties.
3. Step 3: Remember that gold has a distinctive bright yellow color and a high density, which differentiates it from many other metals.
4. Step 4: Understand that gold has excellent electrical conductivity and is chemically inert, meaning it does not corrode or tarnish easily, making it valuable in electronics and jewelry.
5. Step 5: Compare these properties with the given statements to determine which one accurately describes gold's physical properties and its importance.