The Periodic Table of Elements
1
6
H
HYDROGEN
3
1
Li
LITHIUM
11
7
4
Be
C
Atomic Number = Number of Protons = Number of Electrons
12
Atomic Weight = Number of Protons + Number of Neutrons*
12
9
19
23
K
POTASSIUM
37
39
Rb
RUBIDIUM
55
85
Cs
CESIUM
87
133
Fr
FRANCIUM
223
24
Ca
CALCIUM
38
40
Sr
STRONTIUM
56
88
21
Sc
SCANDIUM
39
45
Y
YTTRIUM
89
Ba
BARIUM
88
137
Ra
RADIUM
226
KEY
= Solid at room temperature
22
Ti
TITANIUM
40
METALS
= Radioactive
= Artificially Made
23
V
24
25
26
Cr Mn Fe
VANADIUM
CHROMIUM MANGANESE
41
42
51
52
43
55
Zr Nb Mo Tc
ZIRCONIUM
72
91
Hf
HAFNIUM
178
104
Rf
RUTHERFORDIUM
263
57
La
LANTHANUM
139
= Liquid at room temperature
= Gas at room temperature
48
89
Ac
ACTINIUM
227
B
BORON
13
MAGNESIUM
20
5
Chemical Name
Na Mg
SODIUM
NIOBIUM
73
NON-METALS
Chemical Symbol
CARBON
BERYLLIUM
2
93
Ta
TANTALUM
181
105
Db
DUBNIUM
268
58
Ce
CERIUM
140
90
Th
THORIUM
232
IRON
56
44
74
96
W
TUNGSTEN
184
106
Sg
SEABORGIUM
271
59
Pr
75
98
Re
RHENIUM
186
107
Bh
BOHRIUM
270
60
Al
ALUMINUM
27
Co
COBALT
45
59
76
101
Os
OSMIUM
190
108
RHODIUM
77
103
Ir
IRIDIUM
192
109
Hs Mt
HASSIUM
Pa
231
46
59
270
61
PALLADIUM
78
106
Pt
PLATINUM
195
110
Ds
31
27
14
12
Si
SILICON
32
28
Cu Zn Ga Ge
COPPER
47
64
ZINC
48
65
Ag Cd
SILVER
79
108
CADMIUM
80
112
Au Hg
GOLD
197
111
MERCURY
201
112
GALLIUM
49
70
In
INDIUM
81
115
Tl
THALLIUM
204
113
GERMANIUM
50
73
Sn
TIN
82
119
Pb
LEAD
207
114
144
92
278
62
U
URANIUM
238
145
93
281
63
150
94
281
64
EUROPIUM
152
95
285
65
GADOLINIUM
157
96
15
14
P
PHOSPHORUS
33
31
As
ARSENIC
51
75
Sb
O
OXYGEN
16
16
S
SULFUR
34
32
Se
SELENIUM
52
83
122
79
Te
Bi
BISMUTH
209
115
84
9
F
FLUORINE
17
ANTIMONY TELLURIUM
289
286
66
TERBIUM
159
97
Np Pu Am Cm Bk
NEPTUNIUM PLUTONIUM AMERICIUM
237
N
NITROGEN
8
128
Po
POLONIUM
209
116
19
Cl
CHLORINE
35
35
Br
BROMINE
53
80
I
IODINE
85
127
At
ASTATINE
210
117
4
10
Ne
NEON
18
20
Ar
ARGON
36
40
Kr
KRYPTON
54
84
Xe
XENON
86
131
Rn
RADON
222
118
Rg Cn Uut Fl Uup Lv Uus Uuo
67
Nd Pm Sm Eu Gd Tb Dy Ho
141
PROTACTINIUM
Ni
NICKEL
30
29
C
CARBON
7
MEITNERIUM DARMSTADTIUM ROENTGENIUM COPERNICIUM UNUNTRIUM FLEROVIUM UNUNPENTIUM LIVERMORIUM UNUNSEPTIUM UNUNOCTIUM
PRASEODYMIUM NEODYMIUM PROMETHIUM SAMARIUM
91
28
Ru Rh Pd
MOLYBDENUM TECHNETIUM RUTHENIUM
11
6
He
HELIUM
244
243
CURIUM
247
DYSPROSIUM
163
98
Cf
HOLMIUM
165
99
251
68
293
69
70
71
ERBIUM
167
THULIUM
169
101
YTTERBIUM
173
102
Es Fm Md No
252
294
294
Er Tm Yb Lu
100
BERKELIUM CALIFORNIUM EINSTEINIUM
247
289
FERMIUM
257
MENDELEVIUM NOBELIUM
258
259
LUTETIUM
175
103
Lr
LAWRENCIUM
262
* The atomic weights listed on this Table of Elements have been rounded to the nearest whole number. As a result, this chart actually displays the mass number of a specific isotope for each element. An element's complete, unrounded atomic
weight can be found on the It's Elemental web site: http://education.jlab.org/itselemental/index.html
http://education.jlab.org/
Last revised on April 3, 2013