1. Stability in Bonding
18.1

2. Stability in Bonding
Compound – substance made of the combined atoms of two or more elements.

3. Chemical Formula
tells what elements a compound contains and the exact number of the atoms of those elements
C2H5OH

4. Some Common Compounds Vinegar Acetic acid HC2H3O2 Sand Silicon dioxide
SiO2
Stomach acid
Hydrochloric acid
HCl
Cane sugar
Sucrose
C12O22O11
Lime
Calcium oxide
CaO
Laughing Gas
Dinitrogen oxide
N2O

6. 2H2O
SO42-
Superscript represents the oxidation # or how many electrons have been gained or lost
Coefficient
represents the # of units of each substance
Subscript
represents the # of atoms in a molecule of a particular element

7. Atoms form compounds to become chemically stable
Atoms form compounds to become chemically stable. An atom is chemically stable when the outer energy level is complete or full.

8. Energy Levels and Other Elements
Hydrogen contains one electron in its lone energy level.
It is more stable when it is part of a compound.

9. Energy Levels and Other Elements
When you look at the elements in groups 13 through 17, you see that each of them falls short of having a stable energy level.

10. Chemical bond – force that holds together the atoms in a substance.