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Transcript of Calcium
"The Bone Mineral"
How does calcium react?
What would happen if there was no calcium?
Creation of Calcium
Where can we find Calcium?
Sir Humphrey Davy
lime (CaO) + mercuric oxide (HgO)
24 isotopes with mass numbers from 34 to 57
weakening of the bones due to low bone density
99% in the bones and teeth
others in organs, muscles, blood
about one-third of our body weight is the weight of calcium
softening of the bones in children, softening of the bones with pain
period 4, group 2: Alkaline Earth Metal
boiling point: 839.0 C
melting point: 1484.0 C
3.5% of the Earth's crust
5th most abundant element on crust
calcium + oxygen = calcium oxide
calcium + water = calcium hydroxide + hydrogen
calcium + acids = calcium (acid) + hydrogen
by Jihong Lee