group2 aqa

Which of these elements has the greater melting point?

• Aluminium

• Phosphorus

• Magnesium

• Silicon

Going across Period 3 from Na to Cl,

• the atomic radius of the elements increases

• the ionisation energy of the element decreases

• the electropositivity of the elements decrease

• the reducing power of the elements increases

The following uses of the elements are correct except for

• CaO - Spread on agricultural land to neutralise excess basicity

• CaSO4- Used as plaster for broken limbs

• Mg- Used in aircraft as it has lightweight and low density

• NaOH- Used in the manufacture of soaps

The least reactive alkali metal

• Ceasium
• Potassium
• Lithium
• Rubidium

What is the Atomic Mass?

• 12
• 24
• 24.305
• 48

How many Valence Electrons does one atom of Magnesium have?

• 1
• 2
• 3
• 8

What Period is Magnesium in?

• 3
• 2A
• 4
• 3A

What is the appearance of magnesium? But what happens to it when you expose it to air?

• it is dull and it becomes shiny when exposed to air

• it melts at room temperature and resolidifies when exposed to air

• it turns into a vapor and gives off a red light when exposed to air

• it is shiny but becomes oxidized and dulls when exposed to air

What happens to the boiling and melting points of the alkaline earth metals as you move down the group?

• Increase

• decrease

• remains the same

The solubility of the alkaline earth metal hydroxides in water … . with increase in atomic number down the group.

• Increases

• Decrease

• Little

• Much

• Some