Question

1. a hard, silver - white magnetic metal, easily rusts in moist air a. copper b. iron c. magnetic d. nickel

Explanation:

• Copper is a reddish - brown metal and does not rust easily in moist air.
• Iron is a hard, silver - white magnetic metal that easily rusts in moist air (the rusting of iron is a common chemical reaction \(4Fe + 3O_{2}+xH_{2}O=2Fe_{2}O_{3}\cdot xH_{2}O\)).
• “Magnetic” is an adjective, not a metal.
• Nickel is a silver - white metal, but it is more resistant to corrosion compared to iron in moist air.

Answer:

B. Iron