Chromium is a silvery metallic element with an atomic number of 24. It was discovered in 1797 by Louis-Nicholas Vauquelin and is commonly found in chromite ore. Some key uses of chromium include chrome plating, production of paints and pigments, and hardening steel. It has a high melting point and is used in applications like armor plating, ball bearings, and cutting tools.

1. By: Jeff Jansen

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

6. Chrome
hardened
Armor Plate Chrome oxide green steel
(paint)
Chrome
plated safe Chrome ball
bearings

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

9.  http://www.webelements.com/chromium/
 http://www.chemicool.com/elements/chromium.html#Abundance
 http://www.google.com/imgres?q=chromium+element&um=1&hl=en&biw=1280&bih
=631&tbm=isch&tbnid=nIrDbmhlnVqr2M:&imgrefurl=http://web.as.uky.edu/Chemist
ry/Faculty/Bachas/Genealogy/genetable.html&docid=53HtGKRZUFr_aM&imgurl=htt
p://web.as.uky.edu/Chemistry/Faculty/Bachas/Genealogy/vauquelin.jpg&w=327&h
=432&ei=-
DvFTvSyJIvVgAfM1OH2Dg&zoom=1&iact=hc&vpx=1038&vpy=227&dur=4362&hovh=
258&hovw=195&tx=158&ty=163&sig=110126848219894261128&page=1&tbnh=124&tbn
w=111&start=0&ndsp=21&ved=1t:429,r:20,s:0 (image Founder)
 http://www.google.com/imgres?q=chrome+ball+bearing&um=1&hl=en&biw=1280&bi
h=631&tbm=isch&tbnid=WExbZINvwFFBFM:&imgrefurl=http://www.v-
sheng.com/Bearing%2520%26%2520Ball/bearing/index10.htm&docid=p6Koosf7XEKV
uM&imgurl=http://www.v-
sheng.com/Bearing%252520%2526%252520Ball/bearing/images/steelball1.jpg&w=400
&h=276&ei=KUHFTuKSNcHDgQf705DUDg&zoom=1&iact=hc&vpx=170&vpy=149&d
ur=155&hovh=186&hovw=270&tx=145&ty=108&sig=110126848219894261128&page=1&
tbnh=129&tbnw=173&start=0&ndsp=18&ved=1t:429,r:0,s:0
 http://www.recycleinme.com/scrapresources/DetailedPrice.aspx?cat=Other%20Metals
&subcat=Chromium

10.  http://www.google.com/imgres?q=chromium&um=1&hl=en&sa=N&bi
w=1280&bih=631&tbm=isch&tbnid=JRiVN8ipS5UyEM:&imgrefurl=http:
//en.wikipedia.org/wiki/Chromium&docid=z6Op8d0C10xtHM&imgur
l=http://upload.wikimedia.org/wikipedia/commons/thumb/0/08/Chr
omium_crystals_and_1cm3_cube.jpg/250px-
Chromium_crystals_and_1cm3_cube.jpg&w=250&h=149&ei=QTzFTqGm
JIiygweioenxDg&zoom=1&iact=rc&dur=181&sig=11012684821989426112
8&page=1&tbnh=83&tbnw=140&start=0&ndsp=21&ved=1t:429,r:0,s:0&tx
=52&ty=50
 http://www.google.com/imgres?q=chrome+plated+safe&um=1&hl=en
&biw=1280&bih=631&tbm=isch&tbnid=XZFjX9Ij1Ro49M:&imgrefurl=htt
p://www.wilsonsafe.com/acatalog/high_security_safes.html&docid=Y
wvzF1HO5vsmKM&imgurl=http://www.wilsonsafe.com/acatalog/relia
nce_tn.jpg&w=125&h=133&ei=xkDFTrKpFsStgwemuNCHBw&zoom=1&
iact=hc&vpx=503&vpy=337&dur=3482&hovh=106&hovw=100&tx=78&t
y=99&sig=110126848219894261128&page=1&tbnh=106&tbnw=100&start
=0&ndsp=21&ved=1t:429,r:9,s:0
 http://chemistry.about.com/od/chromium/a/10-Chromium-Facts.htm

11.  http://www.google.com/imgres?q=chromium+paint&um=1&hl=en&sa
=N&biw=1280&bih=631&tbm=isch&tbnid=z_E2xsplQlFwAM:&imgrefur
l=http://www.made-in-china.com/showroom/ruifang1983/product-
detaileqjJHREAmaYx/China-Chromium-Oxide-
Green.html&docid=5JiWsgcPHCZoAM&imgurl=http://image.made-in-
china.com/2f0j00vCyTWgaYTUrQ/Chromium-Oxide-
Green.jpg&w=768&h=512&ei=dD7FTq7zFcrYgQf_wcmGDw&zoom=1&i
act=hc&vpx=353&vpy=132&dur=4728&hovh=183&hovw=275&tx=162&t
y=125&sig=110126848219894261128&page=1&tbnh=130&tbnw=174&start
=0&ndsp=18&ved=1t:429,r:1,s:0
 http://www.google.com/imgres?q=chrome+hardened+steel&um=1&hl
=en&sa=N&biw=1280&bih=631&tbm=isch&tbnid=94Bf4qHIioeCLM:&im
grefurl=http://japan.webike.net/categories/m410/3000_3100.html&doci
d=JKzH_PWhQ-
tUGM&imgurl=http://118.151.169.117/jp_images/images/catalogue/11
526/60486s.jpg&w=140&h=140&ei=uz_FTsDIH8afgwePwuXUDg&zoom
=1&iact=rc&dur=4&sig=110126848219894261128&page=2&tbnh=112&tbn
w=112&start=20&ndsp=21&ved=1t:429,r:0,s:20&tx=101&ty=83
 http://periodictable.com/Elements/024/index.html