AZX Notation
The Nucleus
Atomic Number- Number of protons.
Examples
+1
1amu
Proton
Nucleus
1amu
Neutron
0
Electron Cloud
~1/2000amu
Electron
-1
Mass Number- Number of protons plus the number of neutrons.
Atomic number is the same in all atoms of the same element.
Isotopes have same atomic number, and a diffrent mass number.
Mass Number
Charge
A
Element Symbol
X
Atomic Number
Z
41
Mg
23
P= 23
N= 41-23=18
E= 23