1. Right Now
Copy down your homework
Get ready to answer today’s Do Now

2. Do Now: What do the following things have in common
Do Now: What do the following things have in common? What is the benefit to using them?
BRB
ROTFL
SMH
LOL
GR8 UR
XOXO JK

3. Chemical Symbols and Formulas
Add the new notes to your table of contents, and then turn to the next clean page and set up your title and date

4. Symbols – represent an element
Elements are represented using a 1 or 2 letter symbol
The first letter MUST be capitalized, and the second must be lowercase
Example: H = hydrogen, He = helium

5. Parts of an Element Box on the Periodic Table Tape In

6. Formulas – represent a molecule
Made up of symbols and subscripts
Symbols
abbreviations that represent elements,
they tell you what element(s) are in the molecule
Subscripts
numbers found below and to the right of each symbol,
they tell you how many of each element make up the molecule (no subscript = only one atom of that element)
Ex: H2O
subscript

7. Periodic Table of Elements
Tape this in just like the Matter Decision Chart from yesterday
Add Periodic Table of Elements to your Index

8. Practice Counting Atoms in a Chemical Formula
C = Carbon – ___
H = Hydrogen – ___
AgNO3
Ag = Silver – ___
N = Nitrogen – ___
O = Oxygen - ___

9. more practice…

10. Tape in Tonight’s HW

11. Honors
A polyatomic ion is a group of two or more atoms bonded together that then bond to another atom/group as a unit. (add to index)
If there are more than one of these units bonded in a compound they are contained within parentheses and a subscript is used. The subscript is distributed to all of the elements in the polyatomic ion.
Ex: Ca(NO3)2 Ag(S2NO4)3
Ca = Ag=
N = 1 x 2 = S=
O = 3 x 2 = N=
-O=

12. How many Carbon atoms are there in the following formula C6H12O6
Exit Pass
How many Carbon atoms are there in the following formula C6H12O6 6 1 12