Why Doesn't Gold Rust? The Chemistry of Noble Metals | Science Smart

Añadido: 2026-06-03

[00:00:00]Have you ever wondered why ancient iron swords crumble to dust, but gold coins from the exact same era look brand new?

[00:00:08]When metals like iron or copper meet oxygen in the air, they react. Oxygen steals their electrons, creating rust or a dull tarnish. It's basically metal's worst enemy. But gold? Gold is the ultimate introvert of the periodic table. Thanks to a quirk of quantum physics and relativity, gold holds its outermost electrons incredibly close to its nucleus. Because of this unbreakable grip, gold surface atoms flat out refuse to share their electrons with oxygen.

[00:00:36]Oxygen simply bounces off. No reaction means no rust, making gold virtually immortal. Stay curious and stay science smart.