MOLECULES AND FORMULAS Mr. Dunnum. WHAT IS A FORMULA? The formula tells you which elements make up a compound as well as how many atoms of each element.

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Presentation transcript:

MOLECULES AND FORMULAS Mr. Dunnum

WHAT IS A FORMULA? The formula tells you which elements make up a compound as well as how many atoms of each element are present. The subscript number written below and to the right of each element’s symbol tells you how many atoms of that element exist in one unit of that compound.

WHAT IS A MOLECULE The smallest complete unit of a compound Often times they are showed like this 1 H 2 O 3 NaCl

CHEMICAL FORMULA INDICATES THE ELEMENTS IN A COMPOUND Water H 2 O Carbon Dioxide CO 2 Nitroglycerin C 3 H 5 (NO 3 ) 3 Sulfuric Acid H 2 SO 4 Caffeine C 8 H 10 N 4 O 2 Ammonia NH 3 Sugar C 6 H 12 O 6 Rubbing Alcohol C 3 H 7 OH Table Salt NaCl

ELEMENTS FOR THE DAY! ScandiumSc YttriumY LawrenciumLa ActiniumAc TitaniumTi ZirconiumZr HafniumHf TantalumTa