Cobalt (Co) VS Nickel (Ni)
A definitive side-by-side comparison of two essential element profiles.
VS
Main Differences
Cobalt (Co) is an element in the transition metals category with an atomic number of 27. Nickel (Ni) is an element in the transition metals category with an atomic number of 28.
Nickel (Ni) is 1.0x denser than Cobalt (Co). Furthermore, Cobalt (Co) melts at a significantly higher temperature than Nickel (Ni) (a difference of 40.0 Kelvin).
Where do the names come from?
Co Cobalt (Co) Naming History
The name Cobalt is derived from the German word ''kobald'', meaning goblin.
Ni Nickel (Ni) Naming History
The name is the shortened for of the German 'kupfernickel' meaning either devil's copper or St. Nicholas's copper.
Related Comparisons
Compare
Cobalt (Co)
Nickel (Ni)
Category
Transition Metals
Transition Metals
Atomic Number
27
28
Symbol
Co
Ni
Atomic Mass
58.933 u
58.693 u
Group
9
10
Period
4
4
Block
d-block
d-block
Standard State (at 20°C)
solid
solid
Density
8.9 g/cm³
8.908 g/cm³
Melting Point (°C)
1495°C
1455°C
Melting Point (°F)
2723°F
2651°F
Melting Point (K)
1768 K
1728 K
Boiling Point (°C)
2927°C
2913°C
Boiling Point (°F)
5301°F
5275°F
Boiling Point (K)
3200 K
3186 K
Year Discovered:
1735
1751
CAS Number
7440-48-4
7440-02-0
Origin of Name:
The name is derived from the German word ''kobald'', meaning goblin.
The name is the shortened for of the German 'kupfernickel' meaning either devil's copper or St. Nicholas's copper.