815
Post on 15-Feb-2016
31 Views
Preview:
DESCRIPTION
TRANSCRIPT
816
Classify common substances as elements or compounds based on their symbols and formulas.
• Key concepts/skills:Level 1: Define key vocabulary. Level 2: Classify substances given their
symbols or formulas.Level 3: Compare and contrast elements and
compounds.
Classify common substances as elements or compounds based on their symbols and formulas.
• Key vocabulary:• Pure substances• compound• molecule• Elements• formula• Element symbol• atom (review)
Classify common substances as elements or compounds based on their symbols and formulas.
Pure Substances – made up of only one type of atom or
molecule (Au) (H20 a glass of water is made of only H20 moecules)
I. Elements – matter that cannot be broken down
into a more simple form
A.Each of the 118 elements is represented by a symbol
B.The symbol is always capital/ the second letter of a
symbol is always lower case
Classify common substances as elements or compounds based on their symbols and formulas.
A.Symbols are named after people and places and
do not always match the word
B.Calcium – Ca, Potassium – K, Carbon - C
Classify common substances as elements or compounds based on their symbols and formulas.
II. Compounds – more than one type of atom
joined chemically
A.Formulas are symbols and subscripts that tell what kind
of atom and how many of each atom is in the Compound
B. Ammonia – NH4, Carbon dioxide – CO2 , Glucose
sugar – C6H12O6
Classify common substances as elements or compounds based on their symbols and formulas.
Classify common substances as elements or compounds based on their symbols and formulas.
Elements
SymbolsK- PotassiumCu - Copper
Classify common substances as elements or compounds based on their symbols and formulas.
Examples of Elements and Symbols
Classify common substances as elements or compounds based on their symbols and formulas.
Examples of Compounds and Formulas
Classify common substances as elements or compounds based on their symbols and formulas.
Element or Compound?
top related