|
Oganesson
|
Og
|
118
|
Unknown chemical properties
|
Yuri Oganessian, physicist
|
18
|
7
|
|
|
-5.00
|
|
-350.00
|
|
|
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
|
|
Helium
|
He
|
2
|
Noble gas
|
the Greek helios, 'sun'
|
18
|
1
|
4.00
|
0.00
|
0.00
|
|
4.22
|
5.19
|
|
0.01
|
|
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
|
|
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
|
|
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
|
|
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
|
|
Bromine
|
Br
|
35
|
Reactive nonmetal
|
the Greek bromos, 'stench'
|
17
|
4
|
79.90
|
|
3.12
|
265.80
|
332.00
|
0.47
|
2.96
|
2.40
|
|
Astatine
|
At
|
85
|
Metalloid
|
the Greek astatos, 'unstable'
|
17
|
6
|
|
|
7.00
|
575.00
|
610.00
|
|
2.20
|
0.00
|
|
Tennessine
|
Ts
|
117
|
Unknown chemical properties
|
Tennessee, United States
|
17
|
7
|
|
|
-7.20
|
-723.00
|
-883.00
|
|
|
0.00
|