1. Chemistry of Life

2. Periodic table of elements

3. Examples??

4. Aluminum – as in aluminum foil

5. Oxygen – as in the oxygen we breathe in air

6. Sodium – as in table salt

7. Neon – as in neon signs

8. Gold and silver – as in… you know, gold and silver…

9. Vocabulary Atom Smallest unit of matter Cannot be broken down
Greek atomos means “unable to be cut”

11. Vocabulary Element Pure substance made of only one type of atom
Different elements are found on the periodic table
Example: pure gold is made of many gold atoms

12. Vocabulary
Not all of the matter in the world is pure – made of only one element
For example, there is no “water” element
A group of atoms combined together is a molecule
A group of atoms held
together by bonds

13. A molecule of water (H2O)
Hydrogen atoms
Oxygen atom

14. In a molecule, atoms are held together by bonds

15. Types of bonds Covalent bond Ionic bond
bond formed by the sharing of one or more electrons, between atoms
(need to add something about C forming 4 and that leads to large molecules)
Ionic bond
Bond formed by one atom giving away electron to another atom
No sharing

16. Types of bonds Hydrogen bond
Bond formed when a positive (+) hydrogen atom of one molecule is attracted to a negative (-) atom of another molecule.
Creates partially + and partially - ends + - + - + +