|
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
|
|
Selenium
|
Se
|
34
|
Reactive nonmetal
|
the Greek selene, 'moon'
|
16
|
4
|
78.97
|
0.01
|
4.81
|
453.00
|
958.00
|
0.32
|
2.55
|
0.05
|
|
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
|
|
Sulfur
|
S
|
16
|
Reactive nonmetal
|
the Latin sulphur, 'fire and brimstone'
|
16
|
3
|
32.06
|
|
2.07
|
388.36
|
717.87
|
0.71
|
2.58
|
350.00
|
|
Polonium
|
Po
|
84
|
Post-transition metal
|
Named after the home country of Marie Curie (Polonia, Latin for Poland), who is also the discoverer of Radium
|
16
|
6
|
|
|
9.32
|
527.00
|
1235.00
|
|
2.00
|
0.00
|
|
Astatine
|
At
|
85
|
Metalloid
|
the Greek astatos, 'unstable'
|
17
|
6
|
|
|
7.00
|
575.00
|
610.00
|
|
2.20
|
0.00
|
|
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
|
|
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
|
|
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
|
|
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
|