Staar Chemistry Reference Materials Page 4
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4STA
AR
STAAR CHEMISTRY
TM
REFERENCE MATERIALS
State of Texas
Assessments of
Academic Readiness
PERIODIC TABLE OF THE ELEMENTS
18
1
8A
1A
2
1
14
Atomic number
H
He
1
Si
2
13
14
15
16
17
Symbol
1.008
4.003
2A
3A
4A
5A
6A
7A
Hydrogen
Helium
Atomic mass
28.086
3
4
5
6
7
8
9
10
Li
Be
B
C
N
O
F
Ne
Silicon
Name
2
6.941
9.012
10.812
12.011
14.007
15.999
18.998
20.180
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
11
12
13
14
15
16
17
18
Na
Mg
Al
Si
P
S
Cl
Ar
3
3
4
5
6
7
8
9
10
11
12
22.990
24.305
26.982
28.086
32.066
35.453
39.948
30.974
8B
3B
4B
5B
6B
7B
1B
2B
Sodium
Magnesium
Aluminum
Silicon
Phosphorus
Sulfur
Chlorine
Argon
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
K
Ca
Sc
Ti
V
Cr
Mn
Fe
Co
Ni
Cu
Zn
Ga
Ge
As
Se
Br
Kr
4
39.098
40.078
44.956
47.867
50.942
51.996
54.938
55.845
58.933
58.693
63.546
65.38
69.723
72.64
74.922
78.96
79.904
83.798
Potassium
Calcium
Scandium
Titanium
Vanadium
Chromium
Manganese
Iron
Cobalt
Nickel
Copper
Zinc
Gallium
Germanium
Arsenic
Selenium
Bromine
Krypton
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
Rb
Sr
Y
Zr
Nb
Mo
Tc
Ru
Rh
Pd
Ag
Cd
I n
Sn
Sb
Te
I
Xe
5
85.468
87.62
88.906
91.224
92.906
95.96
(98)
101.07
102.906
106.42
107.868
112.412
114.818
118.711
121.760
127.60
126.904
131.294
Rubidium
Strontium
Yttrium
Zirconium
Niobium
Molybdenum Technetium
Ruthenium
Rhodium
Palladium
Silver
Cadmium
Indium
Tin
Antimony
Tellurium
Iodine
Xenon
55
56
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
Cs
Ba
Lu
Hf
Ta
W
Re
Os
I r
Pt
Au
Hg
Tl
Pb
Bi
Po
At
Rn
6
132.905
137.328
174.967
178.49
180.948
183.84
186.207
196.967
200.59
204.383
207.2
208.980
(209)
(210)
(222)
190.23
192.217
195.085
Cesium
Barium
Lutetium
Hafnium
Tantalum
Tungsten
Rhenium
Osmium
Iridium
Platinum
Gold
Mercury
Thallium
Lead
Bismuth
Polonium
Astatine
Radon
87
88
103
104
105
106
107
108
109
110
111
Mass numbers in parentheses are those of
Fr
Ra
Lr
Rf
Db
Sg
Bh
Hs
Mt
Ds
Rg
the most stable or most common isotope.
7
(223)
(226)
(262)
(267)
(268)
(271)
(272)
(270)
(276)
(281)
(280)
Francium
Radium
Lawrencium
Dubnium
Seaborgium
Bohrium
Hassium
Meitnerium
Darmstadtium Roentgenium
Rutherfordium
57
58
59
60
61
62
63
64
65
66
67
68
69
70
Ce
Pr
Nd
Pm
Sm
Eu
Gd
Tb
Dy
Ho
Er
Tm
Yb
La
Lanthanide Series
138.905
140.116
140.908
144.242
(145)
150.36
151.964
157.25
158.925
162.500
164.930
167.259
168.934
173.055
Lanthanum
Cerium
Praseodymium
Neodymium
Promethium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
89
90
91
92
93
94
95
96
97
98
99
100
101
102
Ac
Th
Pa
U
Np
Pu
Am
Cm
Bk
Cf
Es
Fm
Md
No
Actinide Series
(227)
232.038
231.036
238.029
(237)
(244)
(243)
(247)
(247)
(251)
(252)
(257)
(258)
(259)
Thorium
Protactinium
Uranium
Neptunium
Plutonium
Americium
Curium
Berkelium
Californium
Einsteinium
Fermium
Mendelevium
Nobelium
Actinium
Updated Spring 2011
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