1. How things blow up!!
Not really…
Bonds
Compound
Reactions

2. Bond an attachment among atoms
Compound - a group of atoms with an exact number and type of atoms in it arranged in a specific way
Mixture - any combination or blend of different elements

3. ionic bond
An attraction between ions of opposite charge. Ionic bond formation involves transfer of electrons
Examples - salt, baking soda and lithium chloride

4. covalent bond A covalent bond is a very strong attraction between
two or more atoms that are sharing their electrons.
Examples - water,methane,carbon dioxide, and ammonia

5. Chemical reactions highlight patterns in chemical behavior
Combination reactions
Decomposition reactions
Rearrangement reactions
Displacement reactions

6. Combination reactions - build a compound from simpler
compounds or elements
A + B C
4 H2 + 4 Cl HCl
Decomposition reactions - break a compound into simpler fragments
C A + B
4 H2O H2O + 2 O2
Rearrangement reactions - making and breaking bonds within a
compound.
A B
HOONO HNO3

7. Displacement reactions involve replacement or swapping of parts
of a compound.
A + BC AB + C
AB + CD AD + BC
NaOH + HCl H2O + NaCl

8. ENERGY OF CHEMICAL REACTIONS Energy is absorbed or released in chemical reactions
Endothermic Reactions energy is absorbed
product feels cold
Exothermic Reactions energy is released
product feels HOT

9. Law of Conservation of Mass
In a chemical reaction, matter is neither created nor destroyed
Balancing chemical equations
Same number of elements on both sides of the equation
H2 + O2  H2O
Step 1. List the elements in the equation H O
Step 2. Determine the number of element on each side H O
Step 3. Balance away….
2 H2 + O2  2 H2O