You probably learned in high school chemistry class that core electrons don't participate in chemical bonding.

Scientists at OIST have, for the first time, directly tracked the elusive “dark excitons” inside atomically thin materials.

Research suggests some metals’ semicore electrons may be more active on Earth’s surface than previously thought.

New studies of the “platypus of materials” help explain how their atoms arrange themselves into orderly, but nonrepeating, ...