Chemistry definitions IEB

Chemistry definitions IEB Mixtures - ANS-A combination of two or more pure substances that are not chemically bonded together homogeneous mixture - ANS-A mixture with uniform composition and the various components of the mixture cannot be seen heterogeneous mixture - ANS-A mixture that does not have uniform composition and the various components of the mixture can be seen Pure substances - ANS-Any substance that is not a mixture, including elements and compounds Elements - ANS-Pure substances that cannot be broken down into simpler substances by chemical methods Metalloids - ANS-Display metal as well as non-metal properties Atom - ANS-the smallest component of an element having the chemical properties of the element Molecule - ANS-Two or more atoms covalently bonded Compound - ANS-A pure substance that consists of two or more elements that are chemically binded into a single substance in a fixed ratio Ion - ANS-A charged particle Polyatomic ion - ANS-an ion made of two or more atoms Cations - ANS-Positively charged ions that have lost electrons Anions - ANS-Negatively charged ions that have gained electrons Diffusion - ANS-The spontaneous movement of particles from a high concentration to a low concentration Brownian motion - ANS-random movement of particles resulting from their collision with the fast mpving molecules in air or liquid Kinetic molecular theory - ANS-A model to explain our macroscopic onservations on a microscopic level Sublimation - ANS-Substance changes directly from a liquid to a gas Continues...