The Alkali Metals Flashcards
Alkali metal are in group…
1
They are … Reactive
Extremely
Reactivity in alkali metals increases…
Downwards
Lithium is the … Reactive alkali metal
Least
As reactivity in alkali metals increases, the melting and boiling points … While the density generally…
Decrease, while the density generally increases
Alkali metals are very reactive as…
They only have one electron to lose
Alkali metals as hard/soft
Soft
Alkali metals become harder/softer as you go down the group
Softer
Alkali metals tarnish after … Of exposure to air
Seconds
When cut alkali metals are…
Shiny and silver
Alkali metals react … with air to form oxides
Quickly
Alkali metals react … With water to form … Solutions of…
Rapidly and violently with water to form strongly alkaline solutions of metalhydroxides
Lithium, sodium and potassium are stored…
Under oil
Rubidium and Caesium are stored…
In an inert gas in sealed glass tubes
Metal + water =
Metal hydroxide + hydrogen
All alkali metal hydroxides are… And will turn pH universal indicator paper .. When dissolved in water
Bases and will turn it purple
Sodium … When it reacts with water
Floats, fizzes and melts, perhaps forming a white trail of sodium hydroxide
Lithium … When it reacts with water
Floats and fizzes
Potassium … When it reacts with water
Floats, fizzes, melts and burns
Rubidium and Caesium … When they react with water
Explode
The increase in reactivity in alkali metals is due to…
The distance from the nucleus due to electron shells (they lose the electron)
All group one metal ions are which colours?
Colourless
Group one compounds are … In water and are …. Solids
Mostly soluble in water and typical white ionic solids
Lithium burns with a … Flame
Red
