Subject
chromium
3
cobalt
3
hafnium
3
iron
3
manganese
3
molybdenum
3
nickel
3
palladium
3
platinum
3
technetium
titanium
3
vanadium
3
zirconium
3
actinide
2
lanthanum
2
metal organic compound
2
niobium
2
osmium
2
rhodium
2
ruthenium
2
tantalum
2
tungsten
2
aluminum
1
bismuth
1
cadmium
1
copper
1
gallium
1
gold
1
hydrolysis
1
indium
1
ion
1
iridium
1
lead
1
mercury
1
metal
1
polonium
1
rare earth
1
rare earth compound
1
rare earth organic compound
1
rhenium
1
rhenium compound
1
silver
1
solubility
1
stability
1
thallium
1
thorium
1
tin
1
transition metal
1
water
1
zinc
1