C2.3 The Alkali Metals
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Why do the alkali metals have to be stored under oil?
• They must be stored under oil in order to prevent air and water getting to them. This must be done because the alkaline metals react with water and air.
What is the type of reaction for alkaline metals in water?
Vigorous
What is the trend for melting and boiling points as you descend down the group?
Their melting point and boiling points decrease going down the group.
Why does sodium, lithium and potassium float on water?
All of their densities are less than that of waters. They are very light elements
What is the word equation for an alkali metal’s reaction to water?
Alkali metal + water - —-alkali metal hydroxide +hydrogen
t what temperature does Caesium turn into a liquid?
29 degrees