The video discusses calcium, a dull silver-gray alkaline earth metal, highlighting its safety and importance for bones. It covers the history of calcium's isolation by Humphrey Davi and its various compounds like calcium sulfate and calcium hydroxide, which have multiple uses in construction, water treatment, and food. Calcium carbonate's role in architecture is also mentioned. The video emphasizes calcium's essential role in the body, particularly for bones and teeth, and suggests calcium-rich foods for children and pregnant women.

Who was the scientist responsible for the first successful isolation of calcium?

• Antoine Lavoisier

• Humphrey Davy

• Magnus Ponty

• John Jacob Vercelius

What is another name for calcium sulfate, commonly used in construction?

• Limestone

• Plaster of Paris

• Slaked Lime

• Quicklime

Which calcium compound is used to treat water by acting as a flocculant?

• Calcium Carbonate

• Calcium Hydroxide

• Calcium Phosphate

• Calcium Sulfate

Which of the following is a major component of bone?

• Calcium Carbonate

• Calcium Phosphate

• Calcium Hydroxide

• Calcium Sulfate

Which food is NOT a recommended source of calcium?

• White bread

• Nuts

• Fish

• Green leafy vegetables