|
Promethium
|
Pm
|
61
|
Lanthanide
|
Prometheus of Greek mythology who stole fire from the Gods and gave it to humans
|
|
6
|
|
|
7.26
|
1315.00
|
3273.00
|
|
1.13
|
0.00
|
|
Francium
|
Fr
|
87
|
Alkali metal
|
Francia, the New Latin name for France
|
1
|
7
|
|
|
1.87
|
300.00
|
950.00
|
|
0.70
|
0.00
|
|
Radon
|
Rn
|
86
|
Noble gas
|
From radium, as it was first detected as an emission from radium during radioactive decay
|
18
|
6
|
|
|
0.01
|
202.00
|
211.30
|
0.09
|
2.20
|
0.00
|
|
Radium
|
Ra
|
88
|
Alkaline earth metal
|
the Latin radius, 'ray'
|
2
|
7
|
|
|
5.50
|
973.00
|
2010.00
|
0.09
|
0.90
|
0.00
|
|
Protactinium
|
Pa
|
91
|
Actinide
|
the Greek protos, 'first', and actinium, which is produced through the radioactive decay of protactinium
|
|
7
|
231.04
|
0.00
|
15.37
|
1841.00
|
4300.00
|
|
1.50
|
0.00
|
|
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
|
|
Krypton
|
Kr
|
36
|
Noble gas
|
the Greek kryptos, 'hidden'
|
18
|
4
|
83.80
|
0.00
|
0.00
|
115.79
|
119.93
|
0.25
|
3.00
|
0.00
|
|
Rhenium
|
Re
|
75
|
Transition metal
|
Rhenus, the Latin name for the river Rhine
|
7
|
6
|
186.21
|
0.00
|
21.02
|
3459.00
|
5869.00
|
0.14
|
1.90
|
0.00
|
|
Iridium
|
Ir
|
77
|
Transition metal
|
Iris, the Greek goddess of the rainbow
|
9
|
6
|
192.22
|
0.00
|
22.56
|
2719.00
|
4701.00
|
0.13
|
2.20
|
0.00
|
|
Rhodium
|
Rh
|
45
|
Transition metal
|
the Greek rhodos, meaning 'rose coloured'
|
9
|
5
|
102.91
|
0.00
|
12.41
|
2237.00
|
3968.00
|
0.24
|
2.28
|
0.00
|