Y10 iGCSE U11-13 Revision

Which group of the periodic table are alkali metals found in?

• Group 1

• Group 2

• Group 7

• Group 8

What is formed when sodium reacts with water?

• Sodium oxide and hydrogen

• Sodium hydroxide and hydrogen

• Sodium hydroxide and oxygen

• Sodium hydroxide and carbon dioxide

What is the symbol equation for the reaction between Potassium and water?

• 2K + 2H₂O → 2KOH + H₂

• 2Na + 2H₂O → 2NaOH + H

• 2K + H₂O → 2KOH + CO₂

• 2Na + 2H₂O → 2NaOH + CO₂

Which of the followings is not an alkali metal?

• Li

• Cl

• K

• Cs

How many electrons do the alkali metals have in their outer most shell?

• 1

• 2

• 8

• 7

What happens to the atomic radius of the alkali metals as you move down the group?

• increases

• decreases

• no change

• first increases than decreases

What happens to the melting point of the alkali metals as you move down the group?

• decreases

• increases

• no change

• first increases than decreases

Which alkali metals is the least reactive?

• Lithium

• Sodium

• Potassium

• Rubidium

Which alkali metal has the lowest natural abundance (existence)?

• Francium

• Rubidium

• Potassium

• Sodium

Alkali are so reactive to air. Because of that they are generally stored in ......

• water

• oil

• vaults

• cotton