Into the world of CHROMIUM
Used to make brick molds because of chromium's high melting point.
Added to other metals to harden them.
Chomic Oxide- (Cr2O3) Green pigment in paint.
Potassium dichromate- (K2Cr2O7) Used in the tanning of leather.
Atomic Number and Mass
The Atomic mass of Chromium is 51.9961.
Number of each Particle
Hyphen Notation- Cr- 51.99
- Good conductors of heat and electricity
- Less reactive than alkali metals
- High melting points- 3,465 F
- High densities
- Usually high and tough
(2Cr+3O yields Cr2+ O3)
Mole Ratios : 2 Mol Cr : 3 Mol O 2 Mol Cr: 1 Mol Cr2O3
Percent of Each Element
"mirRor like reflection" when polished
used to Make stainless steel
alMost never found in its elemental state in nature