Question

Which metal added to gold to harden it

Answer 1

Answer:

Copper

Explanation:

we can add copper , silver , zinc to gold to make it harden.

Answer 2

Copper acts as a gold alloy to harden the gold

Explanation:

Gold is a malleable and extremely ductile thus copper is added to gold.Combination of these two elements make it harden.

Beside copper,silver, zinc is also added and used as a gold paler.

Addition of these metals increases the strength, hardness and elasticity of the gold.Thus alloy is used.