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 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 N 15 7 +3 charge Mass number Atomic number

9. Chart Element/ Ion Atomic Number Atomic Mass Mass Number ProtonsNeutronsElectrons N714.01578 (15-7) 4 (7-3) 15 7 +3

10. THE END!!!