1. Protons, Neutrons and Electrons

2. Atomic Symbol The abbreviated name for an element Example:
Carbon’s atomic symbol is C
Iron’s atomic symbol is Fe

3. Atomic Number

4. Atomic Number
Also known as the Proton Number, because it tells you the number of protons each element has
Remember: the atom is neutral…….
So…
So the number of protons (+) MUST be equal to the number of electrons (-).
Atomic Number = # of protons = # of electrons

5. Atomic Mass

6. Atomic Mass The nucleus contains all the atoms mass
The nucleus is made up of protons (+) and neutrons (no charge)
So…
So….Atomic Mass = protons + neutrons