April 2020
Intermediate to advanced
296 pages
5h 20m
English

Ca, when pure, is seldom seen—loves air and water so,
Its apatite gives teeth their sheen. Want limelight? CaO!
Its sulfate’s gypsum—chalky stone,
Vit-D helps food’s Ca build bone.
From “stone” to “quick” to “slaked,” add sand—lime mortar . . . ’round we go!
see-ay
THE THIRD MEMBER OF THE GROUP 2 ALKALINE EARTH METALS
Calcium’s pure form is a relatively soft and shiny metal. But calcium metal reacts readily with water. It also reacts with the oxygen and nitrogen in air, causing a white coating of calcium nitride and calcium oxide to form on its ...