|
Antimony
|
Sb
|
51
|
Metalloid
|
uncertain: perhaps from the Greek anti, 'against', and monos, 'alone', or the Old French antimoine, 'Monk's bane' (stibium in Latin)
|
15
|
5
|
121.76
|
0.00
|
6.69
|
903.78
|
1860.00
|
0.21
|
2.05
|
0.20
|
|
Tellurium
|
Te
|
52
|
Metalloid
|
Latin tellus, 'earth'
|
16
|
5
|
127.60
|
0.03
|
6.23
|
722.66
|
1261.00
|
0.20
|
2.10
|
0.00
|
|
Iodine
|
I
|
53
|
Reactive nonmetal
|
French iode (after the Greek ioeides, 'violet')
|
17
|
5
|
126.90
|
0.00
|
4.93
|
386.85
|
457.40
|
0.21
|
2.66
|
0.45
|
|
Xenon
|
Xe
|
54
|
Noble gas
|
the Greek xenos, 'strange'
|
18
|
5
|
131.29
|
0.01
|
0.01
|
161.40
|
165.03
|
0.16
|
2.60
|
0.00
|
|
Caesium
|
Cs
|
55
|
Alkali metal
|
the Latin caesius, 'sky blue'
|
1
|
6
|
132.91
|
0.00
|
1.87
|
301.59
|
944.00
|
0.24
|
0.79
|
3.00
|
|
Barium
|
Ba
|
56
|
Alkaline earth metal
|
the Greek barys, 'heavy'
|
2
|
6
|
137.33
|
0.01
|
3.59
|
1000.00
|
2170.00
|
0.20
|
0.89
|
425.00
|
|
Lanthanum
|
La
|
57
|
Lanthanide
|
the Greek lanthanein, 'to lie hidden'
|
3
|
6
|
138.91
|
0.00
|
6.15
|
1193.00
|
3737.00
|
0.20
|
1.10
|
39.00
|
|
Cerium
|
Ce
|
58
|
Lanthanide
|
the then recently discovered asteroid Ceres, considered a planet at the time
|
|
6
|
140.12
|
0.00
|
6.77
|
1068.00
|
3716.00
|
0.19
|
1.12
|
66.50
|
|
Praseodymium
|
Pr
|
59
|
Lanthanide
|
the Greek praseios didymos meaning 'green twin'
|
|
6
|
140.91
|
0.00
|
6.77
|
1208.00
|
3793.00
|
0.19
|
1.13
|
9.20
|
|
Neodymium
|
Nd
|
60
|
Lanthanide
|
the Greek neos didymos meaning 'new twin'
|
|
6
|
144.24
|
0.00
|
7.01
|
1297.00
|
3347.00
|
0.19
|
1.14
|
41.50
|