Multiple Choice
Which physical property changes between 100 mL of water at 5°C and 100 mL of water at 45°C?
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1. Intro to General Chemistry
Physical Properties
Multiple Choice
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.
Verified step by step guidance1
Step 1: Identify the key physical properties of gold (Au) by recalling its position in the periodic table and common characteristics of transition metals.
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.
Step 3: Remember that gold has a distinctive bright yellow color and a high density, which differentiates it from many other metals.
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.
Step 5: Compare these properties with the given statements to determine which one accurately describes gold's physical properties and its importance.
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