Subatomic Particles
| Particle |
Symbol |
Charge |
Mass in amu
1/12 of 12C |
| Electron |
e- |
-1 |
0.000549 amu |
| Proton |
p or p+ |
+1 |
1.00728 amu |
| Neutron |
n or n0 |
0 |
1.00867 amu |
Neutrons and Protons are found in the nucleus.
Electrons are in a cloud surrounding the nucleus.
The electron cloud diameter is 10,000 to 100,000 times that of the nucleus.
The nucleus contains almost all of the mass of the atom.
To convert amu to grams divide by 6.022x1023. The amu is also known as the dalton (D).