AII-4
Symbol
Name
Atomic Number
Atomic Weight
In
Indium
49
114.82
Ir
Iridium
77
192.2
K
Potassium
19
39.102
Kr
Krypton
36
83.80
La
Lanthanum
57
138.91
Li
Lithium
3
6.94
Lr
Lawrencium
103
(256)
Lu
Lutetium
71
174.97
Md
Mendelevium
101
(258)
Mg
Magnesium
12
24.305
Mn
Manganese
25
54.938
Mo
Molybdenum
42
95.94
N
Nitrogen
7
14.007
Na
Sodium
11
22,990
Nb
Niobium
41
92.906
Nd
Neodymium
60
144.24
Ne
Neon
10
20.18
Ni
Nickel
28
58.71
No
Nobelium
102
(255)
Np
Neptunium
93
(237)
O
Oxygen
8
15.999
Os
Osmium
76
190.2
P
Phosphorus
15
30.974
Pa
Protactinium
91
(231)
Pb
Lead
82
207.2
Pd
Palladium
46
106.4
Pm
Promethium
61
(147)
Po
Polonium
84
(210)
Pr
Praseodymium
59
140.907
Pt
Platinum
78
195.09
Pu
Plutonium
94
(242)
Ra
Radium
88
(226)
Rb
Rubidium
37
85.47
Re
Rhenium
75
186.2
Rf
Rutherfordium
104
(261)
Rh
Rhodium
45
102.905
Rn
Radon
86
(222)
Ru
Ruthenium
44
101.07
S
Sulfur
16
32.06
Sb
Antimony
51
121.75
Sc
Scandium
21
44.956
Se
Selenium
34
78.96
Table AII-1.—Periodic Table of the Elements—Continued
