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 H2O

• 3 NaCl

CHEMICAL FORMULAINDICATES THE ELEMENTS IN A

COMPOUND

WaterH2O

Carbon DioxideCO2

NitroglycerinC3H5(NO3)3

Sulfuric AcidH2SO4

CaffeineC8H10N4O2

AmmoniaNH3

Sugar C6H12O6

Rubbing Alcohol C3H7OH

Table Salt NaCl

ELEMENTS FOR THE DAY!

Scandium Sc

Yttrium Y

Lawrencium La

Actinium Ac

Titanium Ti

Zirconium Zr

Hafnium Hf

Tantalum Ta