1. Atoms, Elements, Molecules, Compounds, Bonding
Bio Chemistry Unit

2. Matter Everything in the universe is made of matter.
Matter is anything that takes up space and has mass

3. Elements Elements cannot be broken down into simpler matter.
There are over 100 elements but
there are only 92 that occur naturally

4. Atoms Smallest particle of an element. Elements are made of atoms!
Atoms are made of
Protons = Postive charge, found in the nucleus of the atom
Neutrons = Neutral charge, found in the nucleus of the atom
Electrons = Negative charge, found in the outer shell
Postiviely Charged Protons = Negatively Charged Electrons

5. Atoms Elements

6. Periodic Table, Atomic #, Atomic Mass/Mass #
Name of Element
Atomic #
Number of Protons
Number of Electrons
Mass #/Atomic Mass
Number of Protons plus the number of neutrons
Element Symbol

7. Six Essential Elements of Life
CHNOPS
Carbon
Hydrogen
Nitrogen
Oxygen
Phosphorus
Sulfur

8. Molecules vs Compounds
Molecules are two or more atoms bonded together
CO2, H2O, O2,
Compounds are two or more elements bonded together
CO2, H2O But not O2
Why not O2?

9. Bonding Why do atoms bond?
Same reason we do, to be in stable relationship!
Atoms are more stable when they are bonded together.

10. Types of Bonds Covalent Bonding= Sharing of electrons
Ionic Bonding = Gaining or losing of electrons. If an atom gains or loses an electron it is called an ION.

11. What type of Bonding does this cartoon illustrate?