2. Chromium
Atomic Number: 24
Atomic Mass: 51.9961
Group: 6
Period: 4
Color: silvery metallic
Founder: Louis-
Nicholas Vauquelin in
1797
Location: Peru
Greek word for colour
is ‘chroma’
3. Founder of Chromium
and Beryllium
Started with crocite and
used HCl to precipitate
the chromium oxide
then heated to obtain
the metal.
Analyzed emerald in
Peru and realized the
color in it is chromium
4. Solid at room temperature
Silvery metallic color
Melting point: 2180 K (1907 C or 3465 F)
Boiling point: 2944 K (2671 C or 4840 F)
Density: 7.15 g/cm2
Major isotopes: Cr 50, 52, 53, 54
Uses: chrome plating, paints, hardens steel,
armor plates, safes, ball bearing, cutting tools
5. Cr2O3- green pigment
K2Cr2O7- tanning leather
PbCrO4- yellow pigment
Used for fire brick molds due to its high
melting point
7. Element is found in South Africa, India,
Kazakhstan, Zimbabwe, Finland, Iran, Brazil
The chromite ore is obtained from mining
Price of chromium: $6.27 per pound
8. Candian Nickel 1952- made of 1952 steel
covered in chrome
Chromium is antiferromagnetic below room
temperature.
Becomes Paramagnetic above 38 degrees
Celsius
Chromium is the 21st most abundant element
in the Earth's crust. It is present at a
concentration of approximately 100 ppm.
Maybe found in the same vicinity as diamonds
