1. Ch. 19 Section 1 – Stability in Bonding
Chemical Bonds
Ch. 19
Section 1 – Stability in Bonding

2. Combined Elements
Statue of Liberty

3. New properties The compounds formed when Example:
Sodium Chloride (table salt)

4. Formulas Chemical symbols
Chemical formulas: when 2 symbols are written together

5. Formulas show: Example: Subscript (written below): 2 means 2 atoms.
2 atoms of Hydrogen
1 atom of Oxygen
Subscript (written below): 2 means 2 atoms.

6. What elements are in each, and how many atoms of each?
Mg(OH)2
CaO
HC2H3O2
C2H5OH

7. Atomic Stability Atoms combine to make a compound that is
Most elements

8. Noble Gases
Atoms are considered chemically stable when

9. Energy Levels and other Elements
Hydrogen:
Hydrogen is
Either needs
Li, Na, K, Rb, all have 1 electron
Be, Mg, Ca, Sr, all have 2 electrons
All want to combine with someone else

10. Outer levels getting their fill
How do elements find or get rid of extra electrons?
By combining with other elements
Example: Dot diagrams for NaCl

11. Stability is reached Chemical Bond: Example :
H2O shares electrons instead of giving them away