Lewis acids and bases studied chemical bonding. In 1923, Lewis wrote "An acid substance is one which can employ an electron lone pair from another molecule in completing the stable group of one of its own atoms." The Brønsted–Lowry acid–base theory was published in the same year. The two theories are distinct but complementary. A Lewis base is also a Brønsted–Lowry base, but a Lewis acid doesn't need to be a Brønsted–Lowry acid. The classification into hard and soft acids and bases (HSAB theory) followed in 1963. The strength of Lewis acid-base interactions, as measured by the standard enthalpy of formation of an adduct
Internet-related prefixes Internet-related prefixes Internet-related prefixes such as "e-", "i-", "cyber-", "info-", "techno-" and "net-" are added to a wide range of existing words to describe new, Internet- or computer-related flavors of existing concepts, often electronic products and services that already have a non-electronic counterpart. The adjective "virtual" is often used in a similar manner. "Cyber-" is derived from "cybernetic," which comes from the Greek word κυβερνητικός meaning "skilled in steering or governing". It is mainly used in the terms "cyberspace", "cyberlaw", "cyberbullying", "cybercrime", "cyberwarfare", "cyberterrorism", "cybersex", and "cyberdelic" among others. Although it is more commonly used to describe policies and politics