By: Ashley Fuentes

Humphry Davy was the first to discover the
calcium element. He was the first English
chemist and inventor.

The calcium element was invented in the year
1808.

The atomic symbol is “ Ca”.

The atomic name is calcium

The atomic number is 20.

The atomic mass is 40.078

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The number of protons, neutrons, an
electrons in the neutral atom is
20 protons
20 neutrons
20 electrons

Calcium is a metal

Calcium is a solid at room temperature, but it
can be a liquid.

Calcium is in group 2 in the periodic table and
its called Alkaline earth metal. Its in period 4
in the periodic table.

Yes, calcium does have isotopes. Calcium
haves 24 stable isotopes.
The electron configuration is [Ar]4s

Calcium’s ionization energy is 590 kj mol-1


The atomic radius for calcium is 194 pm

Electronegativity is the tendency of an atom
or radical to attract electrons in the formation
of an ionic bond.

The electronegativity is 1.

Calcium is a grey silvery, hard type of metal.

Calcium is the 5th most abundant element in
the Earth's crust, present at a level of about
3% in the oceans and soil.

Pure calcium metal reacts vigorously and
sometimes violently with water and acids.

http://www.webelements.com/calcium/

http://chemistry.about.com/od/elementfacts/
a/10-calcium-facts.htm

https://www.google.com/