Group 2 Flashcards
What are group 2 metals known as?
The alkaline earth metals.
What ions do group 2 metals react to form?
2+ ions - lose two electrons
What do group 2 elements do in air?
They tarnish and form a coating of the metal oxide
How does the atomic radius of group 2 metals vary down the group?
It increases due to additional electron shells
Why does reactivity of group 2 metals increase down the group?
There is increased electron shielding and increased atomic radius so the outer electrons are easier to lose
How do the 1st and 2nd ionisation energies vary down group 2?
It decreases - greater shielding + atomic radius.
How do group 2 atoms react with water?
In a redox reaction to produce a metal hydroxide and hydrogen.
What does a group 2 metal’s reaction with water form?
An alkaline solution
What kind of agents are group 2 metals?
Reducing agents
What can speed up group 2 metal’s reactions with water?
Steam (provides the reaction with extra energy)
How does the reactivity of group 2 metals with water vary down the group?
Reactivity increases
As you go down group 2, the reactions with water become….
…increasingly vigorous
Is the alkalinity of metal oxides increases down group 2, what also increases?
The solubility of the metal oxides increases
What colour precipitates do group 2 metals form with chlorine gas?
White precipitates
How do the reactions with chlorine gas vary down group 2?
The reactions become more vigorous as the elements become more reactive.
