1. Chapter 2 Section 3 -Substances can be classified as either elements or compounds element- the simplest form of matter that can exist under normal conditions -cannot be separated into simpler substances *look at periodic table

2. -Two or more elements can combine chemically with one another to form a: compound- substance that can be separated into two or more substances only by chemical means *CO 2, H 2 0 -look at page 36 figure 2.6 -Sample Problem 2-2, #13 page 39

3. -There are over 100 known elements chemical symbol- one or two letter representation of an element -first letter is always capitalized -second letter, if used, is lower case -many are derived from Latin or Greek names for the elements

4. Elements to Know silverbismuthcobalt aluminumbrominefluorine argoncarbonfrancium arseniccalciumgallium astatinecadmiumgermanium goldchlorinehelium boroncesiumhydrogen bariumcopperiodine berylliumchromiumiron

5. kryptonphosphorustin leadplatinumtitanium lithiumpotassiumtungsten magnesiumradiumxenon manganeseradonzinc mercuryseleniumscandium neonsiliconvanadium nickelsodiumzirconium nitrogenstrontiumtellurium oxygensulfururanium rubidiumantimony