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ELEMENTS
COBALT AND CALCIUM
Cobalt
Cobalt
 This element is called
Cobalt. The atomic
number is 27, and
symbol for Cobalt is
Co.
History
Cobalt was discovered by George Brandt
in 1737. Brandt was trying to prove that
some unknown element (Cobolt) could dye
things, and not bismuth. The name
“Cobolt” comes from the German word
“kobalt,” which means “evil spirit.”
Uses
 Cobalt is can be found in
Zaire, Morocco, and
Canada. It makes up
.003% of the Earth’s
crust. It is usually in
minerals such as cobalite,
smaltite and erythrite. It is
usually used for magnets,
ceramics, and special
glasses.
Fun Facts
 A type of Cobalt is Cobalt-60,
which is know to cause cancer.
 Cobalt can be strongly
magnetized.
 Cobalt can produce a
permanent blue color in glass,
porcelain, pottery, and
ceramic.
 Cobalt is found in meat, dairy
products, and in vitamin B-12.
Pictures
Pictures
Cited Sources
 Bentor, Yinon. Chemical Element.com - Cobalt.
Jan. 31, 2007
<http://www.chemicalelements.com/elements/co.
html>
 Radio Chemistry. Jan. 31, 2007.
<http://www.radiochemistry.org/periodictable/ele
ments/27.html>
 Grey, Theodore. 27 Cobalt. Feb. 1, 2007
http://www.theodoregray.com/PeriodicTable/Ele
ments/027/#sample6.html
Calcium
Calcium
 This element is called
Calcium. Its atomic
number is 20. This
atomic number
means that it has 20
protons in each atom.
The symbol for
Calcium is Ca.
History
 Calcium was discovered
by Sir Humphrey Davy in
1808. He was
experimenting, and
passed a mixture of lime
and mercuric oxide
through an electric
current. That electric
current passed through
an electrolyte. The name
“Calcium” comes from the
Latin base word, “calcis,”
which means “lime.”
Uses
 Calcium is never
found in nature by
itself, and about 4.2%
of the earth’s crust is
made up of it. You
can find it in chalk,
limestone, and
marble. It is used in
fertilizer, concrete and
plaster of paris.
Fun Facts
For our age group, we need about
1300mg of Calcium every day.
If you get muscle cramps in your legs at
night, your blood may be low in calcium.
Fun Facts
 In ice cream, there is
80mg of Calcium.
 In cheese, there is
245mg of Calcium.
 In milk, there is
300mg of Calcium.
Pictures
Pictures
Cited Sources
 Bentor, Yinon. Chemical Element.com - Calcium. Jan 31,
2007
<http://www.chemicalelements.com/elements/ca.html>
 Boothby, Barbara, E. HUHS Nutrition Services Jan 31,
2007
<http://huhs.harvard.edu/ClinicalServices/NutritionKnow
How/Calcium.htm>
 WebElements, Jan 31, 2007
<http://www.webelements.com/webelements/elements/te
xt/Ca/key.html>
Created by….
Erin Strauss
Kathy Au
Zach Galarza