Group 1 Elements Flashcards
What are the group 1 elements otherwise known as?
They are known as the alkali metals.
Why do the group 1 metals all have similar properties?
This is because they all have one electron in their outer shell which makes them very reactive.
What are the two main properties for group 1 metals?
They are soft and they have low density
What is the trend for group 1 metals as you go down the table?
The reactivity increases - the outer electron is more easily lost, as the attraction between the nucleus and electron decreases, because the electron is further away from the nucleus the further down the group you go
Lower melting and boiling points
Higher relative atomic mass
The more violent the reaction
What do alkali metals and non-metals form when they react?
They form ionic compounds.
What is a feature of these ionic compounds?
They are usually white solids that dissolve in water to form colourless solutions.
What happens when a Group 1 metal reacts with water?
It produces Hydrogen gas.
They also produce hydroxides that dissolve in water to give alkaline solutions.
What happens when a Group 1 metal reacts with Chlorine?
Group 1 metals when heated in chlorine gas react vigorously to form white salts called metal chlorides.
What happens when a Group 1 metal reacts with Oxygen?
A metal oxide is formed.
What is formed when Lithium, Sodium and Potassium reacts with Oxygen?
Lithium reacts to form Lithium Oxide Li2O
Sodium reacts to form a mixture of Sodium Oxide Na2O and Sodium Peroxide Na2O2
Potassium reacts to form a mixture of Potassium Peroxide K2O2 and Potassium Superoxide KO2
