Question

using the reactivity series below, explain why the element gold is used for our monetary unit.
reactivity series of metals
lithium
rubidium
potassium
barium
calcium
sodium
magnesium
aluminum
manganese
zinc
chromium
iron
cobalt
nickel
tin
lead
hydrogen
copper
silver
mercury
platinum
gold
(be sure to answer in cer format.)

Explanation:

• Claim (C): Gold is used for monetary units because it is highly unreactive.
• Evidence (E): In the given reactivity series, gold is at the bottom, indicating the lowest reactivity among the listed metals. Metals with lower reactivity are less likely to react with substances like oxygen, water, or acids.
• Reasoning (R): For a metal to be suitable for currency, it needs to be durable (not corrode or react easily over time), malleable, and retain its value. Since gold is very unreactive, it does not tarnish, rust, or undergo chemical changes easily. This means gold coins or bars will remain in good condition for long periods, making it a stable and reliable material for monetary units.

Answer:

• Claim: Gold is used for monetary units because it is highly unreactive.
• Evidence: Gold is at the bottom of the given reactivity series, showing the lowest reactivity among the listed metals.
• Reasoning: A metal for currency needs durability (no easy corrosion/reaction). Gold’s low reactivity means it doesn’t tarnish, rust, or chemically change easily, remaining stable and reliable for long - term use as a monetary unit.