🔍 Key Concepts

• Construction of lead-acid storage batteries • Difference between positive and negative plates in a lead-acid cell • Typical materials used in battery plates (active material vs. grid)

💭 Think About

• Think about what chemical compound is formed on the positive plate when the cell is fully charged. • Recall how the negative plate differs in composition from the positive plate in a standard lead-acid battery. • Ask yourself: which choice describes a material you would expect on the negative plate instead of the positive plate?

✅ Before You Answer

• Identify which option clearly describes pure spongy lead and whether that matches the positive or negative plate. • Identify which option clearly describes lead peroxide and decide which plate it belongs to in a charged lead-acid cell. • Eliminate any option that suggests a composition that does not match typical textbook descriptions of a standard lead-acid storage cell.