Alkaline Earth Metals

The video tutorial explores the properties and reactions of Group 2 metals, focusing on magnesium and calcium. It explains how these metals react with oxygen and water, forming oxides and hydroxides. Magnesium reacts with oxygen to form magnesium oxide and with steam to produce magnesium oxide and hydrogen gas. Calcium reacts with oxygen to form calcium oxide and with cold water to produce calcium hydroxide and hydrogen gas. The video highlights the increasing reactivity and decreasing melting points of these metals down the group, and compares the reactions of magnesium and calcium with water.

Which of the following properties increases as you move down Group 2 of the periodic table?

• Boiling point

• Melting point

• Density

• Hardness

What is the product formed when magnesium reacts with oxygen?

• Magnesium hydroxide

• Magnesium carbonate

• Magnesium oxide

• Magnesium chloride

Why should you avoid looking directly at burning magnesium?

• It can cause skin burns

• It releases toxic fumes

• It produces a bright, white flash

• It emits harmful gases

What color flame does calcium produce when it burns?

• Blue

• Green

• Yellow

• Red

What is the solid product formed when calcium oxide reacts with water?

• Calcium hydroxide

• Calcium sulfate

• Calcium carbonate

• Calcium nitrate

How does the reaction of calcium with water differ from that of magnesium?

• Calcium reacts more vigorously

• Calcium does not react

• Calcium forms a different oxide

• Calcium produces no gas

What gas is produced when magnesium reacts with steam?

• Oxygen

• Hydrogen

• Carbon dioxide

• Nitrogen