Understanding Cobalt
Cobalt (Co) is a chemical element with atomic number 27. It is classified as a transition metal, residing in Group 9 of the periodic table. As a metal, it exhibits characteristic metallic properties.
Macroscopic Physical Properties
Color and Luster
Cobalt typically presents as a lustrous, silvery-white metal with a bluish tint. Its shiny surface is characteristic of many metals.
Texture and Hardness
In its elemental form, cobalt is a hard and brittle metal. Its hardness contributes to its utility in various alloys.
State at Room Temperature
At standard room temperature (approximately 25 °C), cobalt exists as a solid.
Thermal Properties
Melting Point
Cobalt possesses a high melting point. Pure cobalt transitions from a solid to a liquid state at approximately 1495 °C.
Boiling Point
The boiling point of cobalt is significantly higher than its melting point. It changes from a liquid to a gaseous state at approximately 2927 °C.