3.1.2 Group 2 Flashcards
What is a common name given to group 2 metals?
Alkaline earth metals
What is the most reactive metal of group 2?
Barium
List 3 physical properties of group 2 metals
● High melting and boiling points
● Low density metals
● Form colourless (white) compounds
The highest energy electrons of group 2 metals are in which subshell?
s subshell
Does reactivity increase or decrease down group 2? Why?
● Increases
● Electrons are lost more easily because larger
atomic radius and more shielding
What happens to the first ionisation energy as you go down group
2? Why?
Decreases because:
-Number of filled electron shells increases down the group →
increased shielding
- Increased atomic radius → weaker force between outer
-Electron and nucleus → less energy needed to remove
electron
What type of reaction is the reaction between group 2 elements
and oxygen?
redox
Write an equation for the reaction of calcium and oxygen
2Ca (s) + O2 (g) → 2CaO (s)
What is the product when group 2 elements react with water?
Hydroxide and hydrogen gas
Which group 2 element doesn’t react with water?
Beryllium
Which group 2 element reacts very slowly with water?
Magnesium
What type of reaction is the reaction between group 2 metal and water?
redox
Write an equation for the reaction of Barium and water
Ba (s) + 2H2O (l) → Ba(OH)₂ (aq) + H₂ (g)
What is oxidised and what is reduced in a reaction between group 2 metal and water?
Metal → oxidised
One hydrogen atom from each water →
reduced
What are the products when group 2 element reacts with dilute acid?
Salt and hydrogen gas