How is matter classified? SANTA MARIA INSTITUTE Pure substances. ELEMENTS Is a substance that is made Substances in which each particle is alike, they can not be separated into simple components without chemical change. entirely from one type of atom. Example: GOLD Compounds of non COMPOUNDS Substances made of two or more different elements. metals atoms form molecules. Example: Water Compounds of metals atoms and non metal atoms form ions. Example: Sodium chloride (NaCl) HOMOGENEOUS Is a uniform mixture, so its Mixtures. Substances made up of different types of elements and compounds which are physically combined. individual parts are not visible. HETEROGENEOUS Has a variable composition, parts are visible and does not look uniform. Classify the following words as appropriate: Air Cereal in milk Sugar water Oxygen Pizza Gold Rainwater Vodka Hydrogen Peroxide Blood Iced in soda Salad dressing Vinegar Silver Mixed nuts Dishwashing detergent Steel Bowl of colored candies Soil