C2.3 The Alkali Metals Flashcards
1
Q
Why do the alkali metals have to be stored under oil?
A
- 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.
2
Q
What is the type of reaction for alkaline metals in water?
A
Vigorous
3
Q
What is the trend for melting and boiling points as you descend down the group?
A
Their melting point and boiling points decrease going down the group.
4
Q
Why does sodium, lithium and potassium float on water?
A
All of their densities are less than that of waters.
They are very light elements
5
Q
What is the word equation for an alkali metal’s reaction to water?
A
Alkali metal + water - —-alkali metal hydroxide +hydrogen
6
Q
t what temperature does Caesium turn into a liquid?
A
29 degrees
