Proton Neutron and Electron Quick Facts tutorial
Subatomic Particle
Symbol
Location
Charge
Mass
Discovered
by
proton
p
+
nucleus
+1
1.673 x 10
-27
kg
Rutherford
(1911)
neutron
n
0
nucleus
0
1.675 x 10
-27
kg
Chadwick
(1932)
electron
e
-
outside nucleus
-1
9.11 x 10
–31
kg
Thomson
(1897)
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