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activity series
bond energy
bond lengths
calculator
common names
conversion factors: energy
conversion factors: length
conversion factors: mass
conversion factors: pressure
conversion factors: temp.
conversion factors: volume
covalent prefixes
density solver
diatomic elements
e-config. chart
element list
gas law formulas
Ka's of polyprotic acids
Ka's of weak acids
Kb's of weak bases
metric conversion chart
mole conversion chart
molecular geometries
organic prefixes
periodic table
periodic table (flash)
pH/pOH converter
polyatomic ions
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SI units
solubility chart
solubility of salts rules
solubility product constants
stoichiometry chart
temp. conversion
temp. formulas
thermodynamic data
vapor pressure of water
Proton Neutron and Electron Quick Facts
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)
You may also find these related tutorials helpful
Atomic Number
Atomic Weight
Electron Configuration Principles
Electron Configuration Shortcut
History of the Atom
Isotopes
Mass Number
Proton Neutron and Electron Quick Facts
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