1. Atomic Structure

2. Atomic Number
Found on the periodic table

3. Atomic Mass
Found on the periodic table
Round to the 10ths place

4. Mass Number If given, rewrite
If not given, round the atomic mass to the nearest whole number

5. Protons
Atomic number on the periodic table

6. Neutrons
Mass # - atomic # = # neutrons

7. Electrons Electrons have a negative charge No charge = # p+
More e- than p+ = negative charge
Less e- than p+ = positive charge
No charge = # p+
Negative charge = # p+ + charge
Positive charge = # p+ - charge

8. Example
Mass number N
charge 15 +3 7
Atomic number

9. Chart N 7 14.0 15 8 (15-7) 4 (7-3) Element/Ion Atomic Number
Atomic Mass
Mass Number
Protons
Neutrons
Electrons N 7
14.0 15 8
(15-7) 4
(7-3) +3 15 7

10. THE END!!!