CHEM 111 Study Guide - Final Guide: Molar Concentration, Matter Wave, Azimuthal Quantum Number

• School: UMASS-Amherst
• Department: Chemistry
• Course: CHEM 111
• Professor: Sravan Surampudi

Document Summary

The properties of matter depend on the types and arrangement of atoms and molecules. Elements and compounds (chemical reactions between them: mixtures. Element = most basic unit of matter, composed of only one type of atom, cannot be broken down into smaller units by chemical means: ex. Atom: smallest chemical unit of matter or indivisible unit of an element. Molecule: formed when 2 or more atoms join together chemically. Compound: combination of at least 2 or more atoms of different elements bonded together in a defined ratio, can be broken down into smaller units by chemical means. *all compounds are molecules, but not all molecules are compounds. Pure substance: collection of matter that has the same chemical composition throughout: can consist of a single element or a single compound, has unique physical properties, cannot be separated to individual species by physical techniques. Chemical change: involves a change in the chemical composition of the material: ex.