1. Chemical Change Outcomes
SPI
Chemical Change Outcomes
Notes
Science
Learning Intention: Identify the common outcomes of
chemical changes.
Purpose: to understand how we utilize the outcomes of chemical reactions (for energy, transportation, food, etc.)
Success Criteria
I will show that I understand this topic by earning a 90 or
higher on the quiz.
I Can Statement
By the end of this unit I will be able to say...
...I can identify the common outcomes of chemical changes.

2. Chemical Change Outcomes 5 Key Points About Chemical Reactions
Chemical changes happen during chemical reactions
Can not be easily undone or reversed
During these reactions, chemical bonding occurs
Video Link (3 min 50 sec): Chemical Changes
5 Key Points About Chemical Reactions
1) A new substance is formed by rearranging the atoms.
2) The properties of the new substance are different from the properties that you started with.
3) No atoms are created or destroyed in chemical reactions.
4) Atomic bonds are broken and new bonds are formed.
(at the valence electron level)
5) Compounds come from chemical reactions.

3. Video Link (3 min 33 sec): How Atoms Bond Two different types of atoms
Chemical Bonding
In the outer shells, valence electrons are transferred or shared
F.Y.I. called ionic or covalent bonding
Video Link (3 min 33 sec): How Atoms Bond
Molecules: (are formed during chemical bonding)
1) Homoatomic molecules -consist of only one type of atom
2) Heteroatomic molecules -two or more different types of atoms
Only one type of atom
Two different types of atoms
Is a compound molecule

4. Memory Trick (chemical reactions = compounds)
Chemical Reactions Form Molecules
Both homoatomic & heteroatomic molecules (called compounds) are formed during chemical bonding
Video Link (1 min 45 sec): How Molecules Are Formed
Memory Trick
C = C
(chemical reactions = compounds)
Example: When two hydrogen atoms react with one oxygen atom you produce (form) the compound called water (H2O).
Reactants
Product(s)
Oxygen H
Oxygen H H
Two different types of atoms
Is a heteroatomic molecule
(called a compound)

5. Chemical Change Outcomes
SPI
Chemical Change Outcomes
Science
Questions
In Chemical Reactions
A new substance is formed by rearranging the atoms.

6. In Chemical Reactions
The properties of the new substance are different from the properties that you started with.
Reactants
Products

7. In Chemical Reactions
A new substance is formed by rearranging the atoms
Some Chemical Change Indicators
H: Heat-Heat may be given off (it may get hot)
F: Flame- It may burn (like burning paper or wood)
F: Flash-It may flash (like a grenade or gun powder)

8. G: Gas- Gas may be released (may smell different)
In Chemical Reactions
A new substance is formed by rearranging the atoms
Some Chemical Change Indicators
O: Odor/gas-There may be a change in odor (how it smells)
G: Gas- Gas may be released (may smell different)
Physical Changes
Changes the appearance of a substance, but DOES NOT
change the composition of the substance.

9. Chemical Change Outcomes
SPI
Chemical Change Outcomes
Science
Questions
In Chemical Reactions
Atomic bonds are broken and new bonds are formed
(at the valence electron level)