Palladium was discovered in 1803 by William Hyde Wollaston, an English chemist. He named it after the asteroid Pallas, which had been discovered just two years earlier.

It is one of the rarest platinum-group metals, even rarer than platinum in nature.

Its atomic number is 46, placing it among the transition metals on the periodic table.

Palladium is a silvery-white metal that does not tarnish easily in air, making it ideal for jewelry.

It is a superb catalyst, especially in industrial chemical reactions such as hydrogenation and carbon-carbon coupling.

Palladium is a key component in catalytic converters, helping reduce harmful car emissions like carbon monoxide.

It can absorb up to 900 times its own volume in hydrogen, making it a promising material for hydrogen fuel storage.

It is increasingly popular in white gold and platinum jewelry because it provides a shiny, tarnish-resistant finish.

Palladium absorbs neutrons moderately well, so it is sometimes used in nuclear technology and reactors.

Like gold and silver, it is considered a precious metal for investment, with bullion coins and bars available.

Palladium prices can spike dramatically and sometimes exceed platinum due to high demand in the automotive and electronics industries.

Palladium is part of the platinum-group metals (PGMs), alongside platinum, rhodium, ruthenium, iridium, and osmium.

It is highly resistant to oxidation and corrosion, even at high temperatures.

It is used in dental alloys for crowns and bridges because it is biocompatible and durable.

It is also used in multilayer ceramic capacitors and connectors that are essential for smartphones and computers.

Palladium has been used to make coins, including Russian coins in the 19th century.

It is being explored for hydrogen fuel cells because it can speed up the chemical reaction that produces electricity.

Palladium can absorb oxygen, carbon monoxide, and hydrogen, which is unusual among metals.

In pure form, it is soft and malleable, but it can be alloyed for greater durability.

Adding palladium to gold creates white gold, an alternative to nickel-based alloys.

Its atomic weight is 106.42 u, making it lighter than platinum but heavier than silver.

Palladium has six naturally occurring isotopes, with Pd-106 and Pd-108 being the most abundant.

Unlike nickel, palladium rarely causes allergic reactions, making it suitable for sensitive skin.

Its symbol, Pd, is derived from Pallas, maintaining the mythological connection.

Palladium occasionally appears in fiction as a futuristic metal because of its rarity and high-tech associations.