CHEM 110 Lecture 1: CHEM 110 - Lecture #1 - Chapter 1: Chemical Principles I
Document Summary
Chem 110 - lecture #1 - chapter 1: chemical principles i. Chemistry: the study of matter and the changes it undergoes. Matter: anything that has mass and occupies space. Mass: the amount of matter in an object. Substance: a form of matter that has a definite composition and distinct properties. Element: made of the same kind of atom. Compound: made of two or more different kinds of elements. Water is a compound made of molecules. Gases: expand to fill the container, free to move, independent. Liquids: have no fixed shape, particles move around. Solids: rigid shape, fixed volume and position. Pure substance: made of only one component. Mixture: a substance composed of two or more components. An element is a pure substance that cannot be separated into simpler substances by chemical means. Compounds can only be separated into their pure components by chemical means. 1. homogenous mixture: composition is same throughout.
