1. Do Now & Announcements Take out note packet from yesterday
Today: Structure of the Atom
Webquest and Timeline due WED 11/4

2. A Closer Look at the Atom
Answer questions based on simulation: ld-an-atom

3. How do you figure out the number of:
Protons in an atom?
# protons = the atomic number
Electrons in an atom?
# electrons = # protons
FOR NEUTRAL ATOMS, only!
Neutrons in an atom?
# neutrons = mass – # protons

4. What are Isotopes?
Isotopes are different forms of the same element that have a different mass
Isotopes have the same # protons but different # neutrons

5. What are Ions? Ions are atoms that have a positive or negative charge
Ions have an unequal number of protons and electrons

6. Standard Nuclear Notation
Note: for ions, the charge (+ or -) is indicated in the upper right corner