Cobalt (Co)
"Meet **Cobalt Crusader**, the master of magnetism and vibrant hues! This hero infuses life with vital energy and forges super-strong alloys, ready to color your world!"
A memorable persona to anchor Co in your mind.
8.9
Grams per cm³
1495
Celsius (°C)
192
Radius (pm)
Daily Life Link
It's the power behind your phone's battery and the magic behind that striking blue in your favorite artwork.
Discovery & History
Year Discovered
1735
Discovered By
Georg Brandt
Origin of Name
"The name is derived from the German word ''kobald'', meaning goblin."
Technical Properties
Atomic Mass
58.933 u
Standard State
solid
Boiling Point
2927°C
Electron Configuration
[Ar] 3d74s2
1st Ionization Energy
7.881 eV
Electron Affinity
N/A
Oxidation States
"A lustrous, silvery-blue metal that shines with a subtle, cool glow, catching the light like a hidden gem."
Did You Know?
Its name comes from the German word 'kobold,' meaning goblin, because medieval miners found its ores tricky and toxic, blaming mischievous spirits!
Cobalt is the absolute *star* of Vitamin B12 (cobalamin), the ONLY metal that is an essential part of a human vitamin – crucial for your nerves and blood!
Get ready for BLUE! Cobalt compounds create some of the most stunning, intense blue pigments known, used in everything from stained glass to famous paintings.
Just like iron, cobalt is ferromagnetic, meaning it can be strongly magnetized – perfect for powerful magnets in motors and hard drives.