Z 1 • H
Hydrogen
Mass
1.008
p⁺
1
n⁰
0
e⁻
1
H
1
Z 2 • He
Helium
Mass
4.003
p⁺
2
n⁰
2
e⁻
2
He
2
Z 3 • Li
Lithium
Mass
6.94
p⁺
3
n⁰
4
e⁻
3
Li
3
Z 4 • Be
Beryllium
Mass
9.012
p⁺
4
n⁰
5
e⁻
4
Be
4
Z 5 • B
Boron
Mass
10.81
p⁺
5
n⁰
6
e⁻
5
B
5
Z 6 • C
Carbon
Mass
12.011
p⁺
6
n⁰
6
e⁻
6
C
6
Z 7 • N
Nitrogen
Mass
14.007
p⁺
7
n⁰
7
e⁻
7
N
7
Z 8 • O
Oxygen
Mass
15.999
p⁺
8
n⁰
8
e⁻
8
O
8
Z 9 • F
Fluorine
Mass
18.998
p⁺
9
n⁰
10
e⁻
9
F
9
Z 10 • Ne
Neon
Mass
20.18
p⁺
10
n⁰
10
e⁻
10
Ne
10
Z 11 • Na
Sodium
Mass
22.99
p⁺
11
n⁰
12
e⁻
11
Na
11
Z 12 • Mg
Magnesium
Mass
24.305
p⁺
12
n⁰
12
e⁻
12
Mg
12
Z 13 • Al
Aluminium
Mass
26.982
p⁺
13
n⁰
14
e⁻
13
Al
13
Z 14 • Si
Silicon
Mass
28.085
p⁺
14
n⁰
14
e⁻
14
Si
14
Z 15 • P
Phosphorus
Mass
30.974
p⁺
15
n⁰
16
e⁻
15
P
15
Z 16 • S
Sulfur
Mass
32.06
p⁺
16
n⁰
16
e⁻
16
S
16
Z 17 • Cl
Chlorine
Mass
35.45
p⁺
17
n⁰
18
e⁻
17
Cl
17
Z 18 • Ar
Argon
Mass
39.95
p⁺
18
n⁰
22
e⁻
18
Ar
18
Z 19 • K
Potassium
Mass
39.098
p⁺
19
n⁰
20
e⁻
19
K
19
Z 20 • Ca
Calcium
Mass
40.078
p⁺
20
n⁰
20
e⁻
20
Ca
20
Z 21 • Sc
Scandium
Mass
44.956
p⁺
21
n⁰
24
e⁻
21
Sc
21
Z 22 • Ti
Titanium
Mass
47.867
p⁺
22
n⁰
26
e⁻
22
Ti
22
Z 23 • V
Vanadium
Mass
50.942
p⁺
23
n⁰
28
e⁻
23
V
23
Z 24 • Cr
Chromium
Mass
51.996
p⁺
24
n⁰
28
e⁻
24
Cr
24
Z 25 • Mn
Manganese
Mass
54.938
p⁺
25
n⁰
30
e⁻
25
Mn
25
Z 26 • Fe
Iron
Mass
55.845
p⁺
26
n⁰
30
e⁻
26
Fe
26
Z 27 • Co
Cobalt
Mass
58.933
p⁺
27
n⁰
32
e⁻
27
Co
27
Z 28 • Ni
Nickel
Mass
58.693
p⁺
28
n⁰
31
e⁻
28
Ni
28
Z 29 • Cu
Copper
Mass
63.546
p⁺
29
n⁰
34
e⁻
29
Cu
29
Z 30 • Zn
Zinc
Mass
65.38
p⁺
30
n⁰
35
e⁻
30
Zn
30
Z 31 • Ga
Gallium
Mass
69.723
p⁺
31
n⁰
39
e⁻
31
Ga
31
Z 32 • Ge
Germanium
Mass
72.63
p⁺
32
n⁰
42
e⁻
32
Ge
32
Z 33 • As
Arsenic
Mass
74.922
p⁺
33
n⁰
42
e⁻
33
As
33
Z 34 • Se
Selenium
Mass
78.971
p⁺
34
n⁰
46
e⁻
34
Se
34
Z 35 • Br
Bromine
Mass
79.904
p⁺
35
n⁰
45
e⁻
35
Br
35
Z 36 • Kr
Krypton
Mass
83.798
p⁺
36
n⁰
48
e⁻
36
Kr
36
Z 37 • Rb
Rubidium
Mass
85.468
p⁺
37
n⁰
48
e⁻
37
Rb
37
Z 38 • Sr
Strontium
Mass
87.62
p⁺
38
n⁰
50
e⁻
38
Sr
38
Z 39 • Y
Yttrium
Mass
88.906
p⁺
39
n⁰
50
e⁻
39
Y
39
Z 40 • Zr
Zirconium
Mass
91.224
p⁺
40
n⁰
51
e⁻
40
Zr
40
Z 41 • Nb
Niobium
Mass
92.906
p⁺
41
n⁰
52
e⁻
41
Nb
41
Z 42 • Mo
Molybdenum
Mass
95.95
p⁺
42
n⁰
54
e⁻
42
Mo
42
Z 43 • Tc
Technetium
Mass
98
p⁺
43
n⁰
55
e⁻
43
Tc
43
Z 44 • Ru
Ruthenium
Mass
101.07
p⁺
44
n⁰
—
e⁻
44
Ru
44
Z 45 • Rh
Rhodium
Mass
102.906
p⁺
45
n⁰
58
e⁻
45
Rh
45
Z 46 • Pd
Palladium
Mass
106.42
p⁺
46
n⁰
60
e⁻
46
Pd
46
Z 47 • Ag
Silver
Mass
107.868
p⁺
47
n⁰
—
e⁻
47
Ag
47
Z 48 • Cd
Cadmium
Mass
112.414
p⁺
48
n⁰
—
e⁻
48
Cd
48
Z 49 • In
Indium
Mass
114.818
p⁺
49
n⁰
66
e⁻
49
In
49
Z 50 • Sn
Tin
Mass
118.71
p⁺
50
n⁰
69
e⁻
50
Sn
50
Z 51 • Sb
Antimony
Mass
121.76
p⁺
51
n⁰
71
e⁻
51
Sb
51
Z 52 • Te
Tellurium
Mass
127.6
p⁺
52
n⁰
—
e⁻
52
Te
52
Z 53 • I
Iodine
Mass
126.904
p⁺
53
n⁰
74
e⁻
53
I
53
Z 54 • Xe
Xenon
Mass
131.293
p⁺
54
n⁰
—
e⁻
54
Xe
54
Z 55 • Cs
Caesium
Mass
132.905
p⁺
55
n⁰
78
e⁻
55
Cs
55
Z 56 • Ba
Barium
Mass
137.327
p⁺
56
n⁰
82
e⁻
56
Ba
56
Z 72 • Hf
Hafnium
Mass
178.486
p⁺
72
n⁰
106
e⁻
72
Hf
72
Z 73 • Ta
Tantalum
Mass
180.948
p⁺
73
n⁰
108
e⁻
73
Ta
73
Z 74 • W
Tungsten
Mass
183.84
p⁺
74
n⁰
110
e⁻
74
W
74
Z 75 • Re
Rhenium
Mass
186.207
p⁺
75
n⁰
111
e⁻
75
Re
75
Z 76 • Os
Osmium
Mass
190.23
p⁺
76
n⁰
114
e⁻
76
Os
76
Z 77 • Ir
Iridium
Mass
192.217
p⁺
77
n⁰
115
e⁻
77
Ir
77
Z 78 • Pt
Platinum
Mass
195.084
p⁺
78
n⁰
117
e⁻
78
Pt
78
Z 79 • Au
Gold
Mass
196.967
p⁺
79
n⁰
118
e⁻
79
Au
79
Z 80 • Hg
Mercury
Mass
200.592
p⁺
80
n⁰
—
e⁻
80
Hg
80
Z 81 • Tl
Thallium
Mass
204.38
p⁺
81
n⁰
124
e⁻
81
Tl
81
Z 82 • Pb
Lead
Mass
207.2
p⁺
82
n⁰
126
e⁻
82
Pb
82
Z 83 • Bi
Bismuth
Mass
208.98
p⁺
83
n⁰
126
e⁻
83
Bi
83
Z 84 • Po
Polonium
Mass
209
p⁺
84
n⁰
125
e⁻
84
Po
84
Z 85 • At
Astatine
Mass
210
p⁺
85
n⁰
125
e⁻
85
At
85
Z 86 • Rn
Radon
Mass
222
p⁺
86
n⁰
136
e⁻
86
Rn
86
Z 87 • Fr
Francium
Mass
223
p⁺
87
n⁰
136
e⁻
87
Fr
87
Z 88 • Ra
Radium
Mass
226
p⁺
88
n⁰
138
e⁻
88
Ra
88
Z 104 • Rf
Rutherfordium
Mass
267
p⁺
104
n⁰
163
e⁻
104
Rf
104
Z 105 • Db
Dubnium
Mass
268
p⁺
105
n⁰
163
e⁻
105
Db
105
Z 106 • Sg
Seaborgium
Mass
269
p⁺
106
n⁰
163
e⁻
106
Sg
106
Z 107 • Bh
Bohrium
Mass
270
p⁺
107
n⁰
—
e⁻
107
Bh
107
Z 108 • Hs
Hassium
Mass
269
p⁺
108
n⁰
162
e⁻
108
Hs
108
Z 109 • Mt
Meitnerium
Mass
278
p⁺
109
n⁰
—
e⁻
109
Mt
109
Z 110 • Ds
Darmstadtium
Mass
281
p⁺
110
n⁰
171
e⁻
110
Ds
110
Z 111 • Rg
Roentgenium
Mass
280
p⁺
111
n⁰
171
e⁻
111
Rg
111
Z 112 • Cn
Copernicium
Mass
285
p⁺
112
n⁰
173
e⁻
112
Cn
112
Z 113 • Nh
Nihonium
Mass
286
p⁺
113
n⁰
173
e⁻
113
Nh
113
Z 114 • Fl
Flerovium
Mass
289
p⁺
114
n⁰
175
e⁻
114
Fl
114
Z 115 • Mc
Moscovium
Mass
289
p⁺
115
n⁰
175
e⁻
115
Mc
115
Z 116 • Lv
Livermorium
Mass
293
p⁺
116
n⁰
177
e⁻
116
Lv
116
Z 117 • Ts
Tennessine
Mass
294
p⁺
117
n⁰
177
e⁻
117
Ts
117
Z 118 • Og
Oganesson
Mass
294
p⁺
118
n⁰
176
e⁻
118
Og
118
Lanthanides
57-71
Actinoids
89-103
Z 57 • La
Lanthanum
Mass
138.905
p⁺
57
n⁰
82
e⁻
57
La
57
Z 58 • Ce
Cerium
Mass
140.116
p⁺
58
n⁰
82
e⁻
58
Ce
58
Z 59 • Pr
Praseodymium
Mass
140.908
p⁺
59
n⁰
82
e⁻
59
Pr
59
Z 60 • Nd
Neodymium
Mass
144.242
p⁺
60
n⁰
84
e⁻
60
Nd
60
Z 61 • Pm
Promethium
Mass
145
p⁺
61
n⁰
84
e⁻
61
Pm
61
Z 62 • Sm
Samarium
Mass
150.36
p⁺
62
n⁰
—
e⁻
62
Sm
62
Z 63 • Eu
Europium
Mass
151.964
p⁺
63
n⁰
89
e⁻
63
Eu
63
Z 64 • Gd
Gadolinium
Mass
157.25
p⁺
64
n⁰
93
e⁻
64
Gd
64
Z 65 • Tb
Terbium
Mass
158.925
p⁺
65
n⁰
94
e⁻
65
Tb
65
Z 66 • Dy
Dysprosium
Mass
162.5
p⁺
66
n⁰
—
e⁻
66
Dy
66
Z 67 • Ho
Holmium
Mass
164.93
p⁺
67
n⁰
98
e⁻
67
Ho
67
Z 68 • Er
Erbium
Mass
167.259
p⁺
68
n⁰
99
e⁻
68
Er
68
Z 69 • Tm
Thulium
Mass
168.934
p⁺
69
n⁰
100
e⁻
69
Tm
69
Z 70 • Yb
Ytterbium
Mass
173.045
p⁺
70
n⁰
103
e⁻
70
Yb
70
Z 71 • Lu
Lutetium
Mass
174.967
p⁺
71
n⁰
104
e⁻
71
Lu
71
Z 89 • Ac
Actinium
Mass
227
p⁺
89
n⁰
138
e⁻
89
Ac
89
Z 90 • Th
Thorium
Mass
232.038
p⁺
90
n⁰
142
e⁻
90
Th
90
Z 91 • Pa
Protactinium
Mass
231.036
p⁺
91
n⁰
140
e⁻
91
Pa
91
Z 92 • U
Uranium
Mass
238.029
p⁺
92
n⁰
146
e⁻
92
U
92
Z 93 • Np
Neptunium
Mass
237
p⁺
93
n⁰
144
e⁻
93
Np
93
Z 94 • Pu
Plutonium
Mass
244
p⁺
94
n⁰
150
e⁻
94
Pu
94
Z 95 • Am
Americium
Mass
243
p⁺
95
n⁰
—
e⁻
95
Am
95
Z 96 • Cm
Curium
Mass
247
p⁺
96
n⁰
151
e⁻
96
Cm
96
Z 97 • Bk
Berkelium
Mass
247
p⁺
97
n⁰
150
e⁻
97
Bk
97
Z 98 • Cf
Californium
Mass
251
p⁺
98
n⁰
—
e⁻
98
Cf
98
Z 99 • Es
Einsteinium
Mass
252
p⁺
99
n⁰
153
e⁻
99
Es
99
Z 100 • Fm
Fermium
Mass
257
p⁺
100
n⁰
157
e⁻
100
Fm
100
Z 101 • Md
Mendelevium
Mass
258
p⁺
101
n⁰
157
e⁻
101
Md
101
Z 102 • No
Nobelium
Mass
259
p⁺
102
n⁰
—
e⁻
102
No
102
Z 103 • Lr
Lawrencium
Mass
262
p⁺
103
n⁰
—
e⁻
103
Lr
103