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Do Now: What do the following things have in common

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Presentation on theme: "Do Now: What do the following things have in common"— Presentation transcript:

1 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

2 Using Symbols and Formulas
TO DESCRIBE MATTER

3 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

4 Formulas – represent a molecule
Made up of symbols and subscripts Symbols tell you what element(s) are in the molecule Subscripts tell you how many of each element make up the molecule (no subscript = only one atom of that element) Ex/ H2O subscript

5 Example: CH4 C = Carbon – 1 H = Hydrogen – 4 AgNO3 Ag = Silver – 1
N = Nitrogen – 1 O = Oxygen - 3

6 Practice K2CO3 FeCO3 NaNO2 Na2SO4 NaHSO4

7 K2CO3

8 FeCO3

9 NaNO2

10 Na2SO4

11 NaHSO4


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