1. Bellwork Tuesday
To the right is a label from a popular food item. Name five elements that are found on this food label.

2. CHEMISTY I Unit 6 CHAPTER 9
CHEMICAL NAMES AND FORMULAS

3. Molecule- the smallest electrically neutral unit of a substance that still has the properties of that substance -made up of two or more atoms that act as a unit Ex.
CH4 O2
H2O
CO2 O3

4. 9.3 Molecular compound- -usually composed of molecules -Have low melting & boiling points -Are usually made up of two or more NONMETALS
Sugar, a compound made of carbon, hydrogen and oxygen, melts easily in a hot pan.

5. Which of the following is molecular and which is ionic?
NaCl
H2O
CaCO3 CO
Al2Cl3
CF4 O3

6. diatomic molecule –consists of two atoms of the same element (O2 and H2)

7. triatomic molecule- contain three atoms of the same element (O3, ozone)

8. Molecular Compounds and Acids
Binary Molecular Compounds
When naming binary molecular compounds, prefixes are used to tell how many of each atom is in the formula.
CO2 carbon dioxide
N2O4 dinitrogen tetroxide

9. The prefix mono- is never used with the first element
The prefix mono- is never used with the first element. The prefix list in on page 159.
hexa
mono di
hepta
tri
octa
nona
tetra
penta
deca

10. Example: PBr3 ICl3 P2O5 Sulfur hexafluoride tetraarsenic hexoxide
phosphorous tribromide
iodine trichloride
diphosphorous pentoxide
SF6
As4O6

11. 9.4 Acids and Bases hydrochloric acid sulfuric acid nitric acid
You need to know the names and formulas of these most common acids:
HCl
H2SO4
HNO3
HC2H3O2
H3PO4
hydrochloric acid
sulfuric acid
nitric acid
acetic acid
phosphoric acid

12. Covalent
Two Nonmetals
Example:
Rule:
Use _________ to tell the _________ of each element.
_____________
Note: A prefix is NOT needed on the first element if there is only 1.
1= =
2= =
3= =
4= =
5= =
Acids: contain the element ________ at the left of the formula
Need to know:
HCl:
H2SO4:
HNO3:
HC2H3O2:
H3PO4: