El oro: brillante, raro, y precioso

The video explores the element gold, its properties, and its historical significance. Gold, with atomic number 79 and symbol Au, is a transition metal known for its malleability and ductility. Pure gold is too soft for jewelry, so it is alloyed with other metals. Gold's high conductivity makes it valuable in electronics, though its cost limits its use. Historically, gold has been used as currency and remains valuable due to its rarity and extraction challenges. Gold mining has significant environmental impacts, including the use of toxic chemicals like cyanide, posing risks to ecosystems and human health.

What is the atomic number of gold?

• 78

• 81

• 79

• 80

Why is pure gold not typically used to make jewelry?

• It is too expensive.

• It is too heavy.

• It is too rare.

• It is too soft and malleable.

What does a higher carat number indicate about a gold alloy?

• It contains more gold.

• It contains more silver.

• It is more durable.

• It is less valuable.

What percentage of the world's gold consumption is used in electronics?

• 5%

• 15%

• 20%

• 10%

What is a major environmental concern associated with gold mining?

• Noise pollution

• Water contamination with cyanide

• Air pollution

• Deforestation