1. Ca
Calcium

2. Sir Humphry Davy was the
discoverer of calcium, in
1808. He isolated calcium
when he electrolyzed lime
and mercuric oxide, HgO.
He was a chemist and
inventor and considered
Britain's leading scientist
at the time. His biggest
contributions were in
mining and agriculture.

3. Calcium comes from the Latin term
calx, meaning lime. It occurs naturally
in limestone. Calcium makes up an
estimated 3.5% of the earth’s crust!

4.  Atomic number is 20
 Mass is 40.078 amu
 Melting point of 839.0 degrees Celsius
 Boiling point of 1484.0 degrees Celsius
 20 Protons
 20 Neutrons
 20 Electrons
 Alkaline Earth
 Density of 1.55 g/cm3
 Silvery Color

5. •Stalactites, as shown to
the left, are mainly
calcium
carbonate, CaCO3. You
will also find calcium
carbonate in
eggshells, shells of
mollusks, snails, and
pearls!
•Calcium oxide, CaO, is
used for treatment of
drinking water and also
used in the process of
making cement.

6. Calcium is an important
part of animal skeletons.
Calcium is also necessary
in plant growth.

7. http://www.youtube.com/watch?v=yXjVjuFBVrk
http://www.youtube.com/watch?v=8WmsQEPUHtw

8. 42Ca 43Ca 44Ca 46Ca are all
carbonate isotopes and 48Ca is a
carbonate and oxide isotope.
There are 19 total isotopes, these
are just the stable ones. They are
used in clinical and nutritional
research. Calcium deficiency in
women is related to increased
severity of osteoporosis, and in
children calcium deficiency can
cause development of rickets.

9. Pure calcium is
$20.00 per 100g.
You can find this on
the internet from
various suppliers or
they have
supplements online
or in drugstores.

10. Calcium. Chemicool Periodic Table. Chemicool.com. May 14 2011. Web.
11/10/2011 <http://www.chemicool.com/elements/calcium.html>.
Bentor, Yinon. ChemicalElement.com - Calcium. Web. 11/10/2011
<http://www.chemicalelements.com/elements/ca.html>.
Heimenstine, Anne Ph.D. Calcium facts. About.com. 2011. Web. 11/11/2011
<http:www.chemistry.about.com>.
Stable Calcium Isotopes. Tracesciences.com. 2008. Web. 11/16/2011
<http://www.tracesciences.com/ca.html.com>.
The Element Calcium. Education.jlab.org. Web. 11/06/2011
<http://education.jlab.org/itselemental/ele020.html>.
Facts About Calcium. Facts-about.org. Web. 11/06/2011 <http://www.facts-
about.org.uk/science-element-calcium.htm>.
Spartacus Educational. Spartacus.schoolnet.co. Web. 11/05/2011
<http://www.spartacus.schoolnet.co.uk/SCdavy.htm>.