Question

lead (pb), silver (ag), and iron (fe) are examples of which of the following? a molecules b compounds c elements d all of the above

Explanation:

• Molecules: Consist of two or more atoms bonded together. Lead, silver, and iron are single - atom substances in their elemental form (not in molecular form like \(O_2\)).
• Compounds: Formed when two or more different elements chemically combine. These are pure elements, not combinations of different elements.
• Elements: Substances that cannot be broken down into simpler substances by chemical means. Lead (\(Pb\)), silver (\(Ag\)), and iron (\(Fe\)) are each listed in the periodic table as individual elements.

Since they are not molecules (in the sense of multi - atom non - elemental units) or compounds (combinations of different elements), they must be elements.

Answer:

C. elements