Number of Protons

Number of Protons


Number of Protons - What are Protons?
Protons are much larger and heavier than electrons and have a positive charge. Protons are positively charged and located in the nucleus together with the neutrons. Protons have a charge of +1 and a mass of approximately 1 atomic mass unit (amu).

Number of Protons - How to find the Atomic Number of an element
Every element has a unique Element Symbol and a unique Atomic Number which can be accessed via the Periodic Table with Atomic Mass.

You can also refer to the bottom of this page to an at-a-glance chart of all the elements and their atomic number in numerical order together with the number of protons for each element.

 

The atomic number = The number of protons in the atom of an element.

Number of Protons

Number of Protons - How to find the Number of Protons - Examples
The atomic number is based on the number of protons in the atom of an element. (Note: Atoms must also have equal numbers of protons & electrons.) So, if we know the atomic number of an element then we also know how many protons in an element.

  • Example 1 - Number of Protons in Gold: The element Gold (Symbol Au) has the Atomic Number of 79. Any atom that contains exactly 79 protons in its nucleus is an atom of gold. The number of protons in atom of gold is therefore 79.

  • Example 2 - Number of Protons in Silver: The element Silver (Symbol Ag) has the Atomic Number of 47. Any atom that contains exactly 47 protons in its nucleus is an atom of silver. The number of protons in atom of silver is therefore 47.

  • Example 3 - Number of Protons in Neon: The element Neon (Symbol Ne) has the Atomic Number of 10. Any atom that contains exactly 10 protons in its nucleus is an atom of gold. The number of protons in atom of gold is therefore 10.

Number of Protons - Adding or Removing Protons
Adding or removing protons from the nucleus of an atom creates a different element. For example, removing one proton from an atom of Gold creates an atom of Platinum (Platinum has the Atomic number 78 therefore the number of protons = 78.) Adding one proton from an atom of Gold creates an atom of Mercury (Mercury has the Atomic number 80 therefore the number of protons = 80.). Refer to the table below and work out the number of protons in various elements.

Number of Protons - How to find the Number of Protons
Calculating the number of protons in an atom or element by using the atomic number information.

Name of Element Symbol of ElementAtomic NumberNumber of Protons
Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
Sodium
Magnesium
Aluminium
Silicon
Phosphorus
Sulfur
Chlorine
Argon
Potassium
Calcium
Scandium
Titanium
Vanadium
Chromium
Manganese
Iron
Cobalt
Nickel
Copper
Zinc
Gallium
Germanium
Arsenic
Selenium
Bromine
Krypton
Rubidium
Strontium
Yttrium
Zirconium
Niobium
Molybdenum
Technetium
Ruthenium
Rhodium
Palladium
Silver
Cadmium
Indium
Tin
Antimony
Tellurium
Iodine
Xenon
Cesium
Barium
Lanthanum
Cerium
Praseodymium
Neodymium
Promethium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
Lutetium
Hafnium
Tantalum
Tungsten
Rhenium
Osmium
Iridium
Platinum
Gold
Mercury
Thallium
Lead
Bismuth
Polonium
Astatine
Radon
Francium
Radium
Actinium
Thorium
Protactinium
Uranium
Neptunium
Plutonium
Americium
Curium
Berkelium
Californium
Einsteinium
Fermium
Mendelevium
Nobelium
Lawrencium
Rutherfordium
Dubnium
Seaborgium
Bohrium
Hassium
Meitnerium
Darmstadtium
Roentgenium
Ununbium
Ununtrium
Ununquadium
Ununpentium
Ununhexium
Ununseptium
Ununoctium
H
He
Li
Be
B
C
N
O
F
Ne
Na
Mg
Al
Si
P
S
Cl
Ar
K
Ca
Sc
Ti
V
Cr
Mn
Fe
Co
Ni
Cu
Zn
Ga
Ge
As
Se
Br
Kr
Rb
Sr
Y
Zr
Nb
Mo
Tc
Ru
Rh
Pd
Ag
Cd
In
Sn
Sb
Te
I
Xe
Cs
Ba
La
Ce
Pr
Nd
Pm
Sm
Eu
Gd
Tb
Dy
Ho
Er
Tm
Yb
Lu
Hf
Ta
W
Re
Os
Ir
Pt
Au
Hg
Tl
Pb
Bi
Po
At
Rn
Fr
Ra
Ac
Th
Pa
U
Np
Pu
Am
Cm
Bk
Cf
Es
Fm
Md
No
Lr
Rf
Db
Sg
Bh
Hs
Mt
Ds
Rg
Uub
Uut
Uuq
Uup
Uuh
Uus
Uuo
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
Name of Element (Alphabetical list)Symbol of ElementAtomic NumberNumber of Protons
 
Numbers of Protons

 

Number of Protons

Number of Protons and the Periodic Table - the most important chemistry reference there is, and
the cornerstone of science since 1869


 

Number of Protons - Table - List - Chart - Facts - Information - Table - Chart of Table - List - Number of Protons - Chart - Chart of Table - Facts - Information - Elements - Chart of Table - List - Chart - List - Chart - Protons - Chemistry - Chart of Table - Elements - List - Chart - List - Chart - Table - Chemistry - Table - Chemistry - Chart of Table - List - Chart - Number of Protons - Table - Facts - Information - Number of Protons - Facts - Information - Elements - Table - List - Chart - Chemistry - Chart of Table - Elements - List - Chart - Chemistry - Chart of Table - List - Chart - Number of Protons - Chemistry - Number of Protons - Written By Linda Alchin