Calcium in Changing Materials / International School of Central Switzerland (isocs)
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Calcium is a chemical element. Its symbol on the periodic table (a list of all the elements) is Ca. Its atomic number is 20. (The atomic number says where Calcium sits in the periodic table.) It has 20 protons and 20 electrons(if is an atom, see ion). The most common isotopes are Ca-40 and Ca-44. Its mass number is about 40.08. Calcium is very important in the human body, It is required for minerals and bones. (link)

Calcium - Periodic Table of Videos

Uploaded on Dec 13, 2010

Calcium - The Element in Action

Calcium - The Element in Action from Sandy Chase on Vimeo.

Project: Calcium- It's Elemental