241 
system. Tabel 2. 
Gruppe Y 
Gruppe VI [Gruppe VII 
I 
Gruppe VIII 
Kvælstof 
N 14.01 
Surstof 
O 16.00 
Fluor 
F 19.0 
Fosfor 
P 31.04 
Svovl 
S 32.07 
Klor 
C1 35.46 
Vanadium 
V 51.0 
Krom 
Cr 52.0 
Mangan 
Mn 54.93 
Jern Kobolt Nikkel 
Te 55.84 Co 58.97 Ni 58.68 
Arsen 
As 74.96 
Selen 
Se 79.2 
Brom 
Br 79.92 
Niob 
Nb 93.5 
Molybdæn 
Mo 96.0 
-. 
Ruthenium Rhodium Palladium 
Ru 101.7 Rh 102.9 Pd 106.7 
Antimon 
Sb 120.2 
Tellur 
Te 127.5 
Jod 
J 126.92 
Praseodym Neodym Samarium 
Pr. 140.6 Nd 144.3 Sa 150.4 
Dysprosium Erbium 
Dy 162.5 Er 167.7 
Tantal 
Ta 181.5 
Wolfram 
— 
Osmium Iridium 
Os 190.9 Ir 193.1 
Platinum 
Pt. 195.2 
Wismuth 
Bi 208.0 
(Polonium) 
— 
(Uranium X 2 ) 
(Brevium) 
Uranium 
U 238.5 
y 
16 
