Group 2 - Alkaline Earth Metals

The video tutorial explores the properties and reactions of alkaline earth metals, focusing on magnesium and calcium. It discusses their reactions with oxygen and water, highlighting the formation of oxides and hydroxides. The tutorial also compares the reactivity trends within the group, noting that reactivity increases down the group. Magnesium reacts with oxygen to form magnesium oxide and with steam to produce hydrogen gas. Calcium reacts with oxygen to form calcium oxide and with cold water to produce calcium hydroxide and hydrogen gas. The video emphasizes the importance of understanding these reactions and their implications.

Which of the following is NOT a characteristic of alkaline earth metals?

• They have two electrons in their valence shell.

• They are stored in oil, except for magnesium.

• They form ions with a plus 2 charge.

• They are located in group 1 of the periodic table.

What is the result of magnesium reacting with oxygen?

• Magnesium chloride

• Magnesium oxide

• Magnesium sulfate

• Magnesium carbonate

How does calcium's hardness compare to magnesium?

• Calcium is brittle compared to magnesium.

• Calcium is softer than magnesium.

• Calcium and magnesium have the same hardness.

• Calcium is harder than magnesium.

What color flame does calcium produce when it reacts with oxygen?

• White

• Blue

• Green

• Red

What is formed when calcium oxide reacts with water?

• Calcium hydroxide

• Calcium carbonate

• Calcium sulfate

• Calcium nitrate

Which gas is produced when magnesium reacts with steam?

• Hydrogen

• Nitrogen

• Carbon dioxide

• Oxygen

How does the reactivity of calcium with water compare to magnesium?

• Calcium and magnesium have the same reactivity.

• Calcium does not react with water.

• Calcium is more reactive than magnesium.

• Calcium is less reactive than magnesium.