|
Plutonium
|
Pu
|
94
|
Actinide
|
Pluto, a dwarf planet in the Solar System (then considered the ninth planet)
|
|
7
|
|
|
19.84
|
912.50
|
3501.00
|
|
1.28
|
0.00
|
|
Platinum
|
Pt
|
78
|
Transition metal
|
the Spanish platina, meaning 'little silver'
|
10
|
6
|
195.08
|
0.01
|
21.46
|
2041.40
|
4098.00
|
0.13
|
2.28
|
0.01
|
|
Phosphorus
|
P
|
15
|
Reactive nonmetal
|
the Greek phoosphoros, 'carrying light'
|
15
|
3
|
30.97
|
0.00
|
1.82
|
317.30
|
550.00
|
0.77
|
2.19
|
1050.00
|
|
Palladium
|
Pd
|
46
|
Transition metal
|
the then recently discovered asteroid Pallas, considered a planet at the time
|
10
|
5
|
106.42
|
0.01
|
12.02
|
1828.05
|
3236.00
|
0.24
|
2.20
|
0.02
|
|
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
|
|
Osmium
|
Os
|
76
|
Transition metal
|
the Greek osmè, meaning 'smell'
|
8
|
6
|
190.23
|
0.03
|
22.61
|
3306.00
|
5285.00
|
0.13
|
2.20
|
0.00
|
|
Oganesson
|
Og
|
118
|
Unknown chemical properties
|
Yuri Oganessian, physicist
|
18
|
7
|
|
|
-5.00
|
|
-350.00
|
|
|
0.00
|
|
Nobelium
|
No
|
102
|
Actinide
|
Alfred Nobel, chemist, engineer, inventor of dynamite
|
|
7
|
|
|
-9.90
|
-1100.00
|
|
|
1.30
|
0.00
|
|
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
|
|
Niobium
|
Nb
|
41
|
Transition metal
|
Niobe, daughter of king Tantalus from Greek mythology
|
5
|
5
|
92.91
|
0.00
|
8.57
|
2750.00
|
5017.00
|
0.27
|
1.60
|
20.00
|