|
Helium
|
He
|
2
|
Noble gas
|
the Greek helios, 'sun'
|
18
|
1
|
4.00
|
0.00
|
0.00
|
|
4.22
|
5.19
|
|
0.01
|
|
Neon
|
Ne
|
10
|
Noble gas
|
the Greek neos, meaning 'new'
|
18
|
2
|
20.18
|
0.00
|
0.00
|
24.56
|
27.07
|
1.03
|
|
0.01
|
|
Nitrogen
|
N
|
7
|
Reactive nonmetal
|
the Greek nitron and '-gen' meaning 'niter-forming'
|
15
|
2
|
14.01
|
0.00
|
0.00
|
63.15
|
77.36
|
1.04
|
3.04
|
19.00
|
|
Oxygen
|
O
|
8
|
Reactive nonmetal
|
from the Greek oxy-, both 'sharp' and 'acid', and -gen, meaning 'acid-forming'
|
16
|
2
|
16.00
|
0.00
|
0.00
|
54.36
|
90.20
|
0.92
|
3.44
|
461000.00
|
|
Fluorine
|
F
|
9
|
Reactive nonmetal
|
the Latin fluere, 'to flow'
|
17
|
2
|
19.00
|
0.00
|
0.00
|
53.53
|
85.03
|
0.82
|
3.98
|
585.00
|
|
Argon
|
Ar
|
18
|
Noble gas
|
the Greek argos, 'idle'
|
18
|
3
|
39.95
|
0.00
|
0.00
|
83.80
|
87.30
|
0.52
|
|
3.50
|
|
Chlorine
|
Cl
|
17
|
Reactive nonmetal
|
the Greek chloros, 'greenish yellow'
|
17
|
3
|
35.45
|
|
0.00
|
171.60
|
239.11
|
0.48
|
3.16
|
145.00
|
|
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
|
|
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
|
|
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
|