EOG Review: Elements, Compounds, Mixtures

Vocabulary: Element - A pure substance composed of a defined number of protons, neutrons, and electrons, giving it unique properties specific to the substance.Homogeneous Mixture - Two of more substances physically combined, that are visually uniform throughout.Compound - Two or more elements that have been chemically bonded by a chemical reaction, creating a new substance with new, unique properties.Heterogenous Mixture - Two or more substances physically combined, where the parts can be visually distinguished.Pure Substance - A substance that has a defined composition, giving it a unique set of physical and chemical properties. Sort the facts and examples into the correct column. Elements Also called atoms. Have a set number of protons, neutrons, and electrons. The most simple form of matter. Has specific physical and chemical properties controlled by the arrangement of the subatomic particles. Ex: Metal - Calcium (Ca) Ex: Metalloid - Arsenic (As) Ex: Nonmetal - Helium (He) Compounds Also called molecules. Have a set combination of bonded elements. Can only be separated by chemical reactions. Has specific physical and chemical properties that are different than the elements from which they are made. Example: Water (H2O) Example: Glucose (C6H12O6) Example: Salt (NaCl) Mixtures Also called solutions, suspensions, or colloids. Can contain a variety of substances. Can be separated physically by evaporation, filtration, sifting, and magnetism. Retains the properties of the substances from which they are made. Example: Homogeneous Solution - Koolaid Example: Heterogeneous Colloid - Milk Example: Heterogeneous Suspension - Italian Salad Dressing