Cadmium (Cd) VS Cobalt (Co)
A definitive side-by-side comparison of two essential element profiles.
VS
Main Differences
Cadmium (Cd) is an element in the transition metals category with an atomic number of 48. Cobalt (Co) is an element in the transition metals category with an atomic number of 27.
Cobalt (Co) is 1.0x denser than Cadmium (Cd). However, Cobalt (Co) melts at a higher temperature than Cadmium (Cd) (a difference of 1173.8 Kelvin).
Where do the names come from?
Cd Cadmium (Cd) Naming History
The name Cadmium is derived from the Latin 'cadmia', the name for the mineral calamine.
Co Cobalt (Co) Naming History
The name Cobalt is derived from the German word ''kobald'', meaning goblin.
Related Comparisons
Compare
Cadmium (Cd)
Cobalt (Co)
Category
Transition Metals
Transition Metals
Atomic Number
48
27
Symbol
Cd
Co
Atomic Mass
112.414 u
58.933 u
Group
12
9
Period
5
4
Block
d-block
d-block
Standard State (at 20°C)
solid
solid
Density
8.65 g/cm³
8.9 g/cm³
Melting Point (°C)
321.069°C
1495°C
Melting Point (°F)
609.924°F
2723°F
Melting Point (K)
594.22 K
1768 K
Boiling Point (°C)
767°C
2927°C
Boiling Point (°F)
1413°F
5301°F
Boiling Point (K)
1040 K
3200 K
Year Discovered:
1817
1735
CAS Number
7440-43-9
7440-48-4
Origin of Name:
The name is derived from the Latin 'cadmia', the name for the mineral calamine.
The name is derived from the German word ''kobald'', meaning goblin.