), a negatively charged ion with two electrons. This unique state makes hydrides essential for everything from cleaning lab equipment to powering future spacecraft. 1. The Three Faces of Hydrides
Hydrides aren't just lab curiosities; they are workhorses in modern technology: hydride
: Formed with transition metals like palladium or titanium. In these, hydrogen atoms actually "squeeze" into the gaps (interstices) of the metal's crystal lattice. This creates a material that can act like an alloy and conduct electricity. ), a negatively charged ion with two electrons
: Formed when hydrogen bonds with highly electropositive alkali or alkaline-earth metals (like sodium or calcium). These are typically high-melting, reactive solids that release hydrogen gas violently when they touch water. hydride