Chem 103 Exam Questions with All Correct Answers

Chem 103 Exam Questions with All Correct Answers Matter - ANSWER The physical material of the universe; it is anything that has mass and occupies space. property - ANSWER any characteristic that allows us to recognize a particular type of matter and to distinguish it from other types. elements - ANSWER over 100 varieties of matter that combines to form everything in the world. Substances that can not be decomposed for any reason. atoms - ANSWER the infinitesimally small building block of matter. molecules - ANSWER two or more atoms joined together in specific shapes. states of matter - ANSWER a sample of matter that is either a gas, liquid, or solid. liquid - ANSWER a distinct volume dependence, yet has no specific shape. solid - ANSWER definite shape and volume gas - ANSWER no fixed volume, and conforms in shape. pure substances - ANSWER matter that has distinct properties and and structure that does not vary. Compounds - ANSWER substances composed of two or more elements. Mixtures - ANSWER combinations of two or more substances, each substance maintains its chemical identity. law of constant composition - ANSWER (law of definite proportions) notes that elemental composition of a compound is always the same. solutions - ANSWER when substances disolve in water to form homogeneous mixtures. physical properties - ANSWER observation of substance withough changing identity, composition (color, odor, density, melting point, ect) Chemical properties - ANSWER the way a substance may change/react. (flammability)