Alkali Metals Flashcards
How soft are the alkali metals?
Soft enough to be cut with a knife.🗡
How much denstity does lothium and potassium and sodium
Low density🗝
They float on water
How high is the melting point?
Low, caesium melts in ur hand👨🚒
How reactive?
Very reactive
How reactive are they the further you go down the group?
More
Reaction with oxygen
They react readliy forming metal oxide
Where are they stored so they dont react with oxygen?
Under oil in a jar
What happens when you cut it?
Its shiney, but becomes coayed with a layer of oxide
Tarnishing happens more quickly going down the group👼🏻
Reaction with water
All alkali metals react vigorously with cold water forming an alkali solution of metal hydroxide and hydrogen gas.🧜🏼♂️
What colour is the solution?
Colourless🧙♀️
What colour will the solution go if universal indicator is added?
Purple🧞♀️
What colour will the solution go with litmus?
Blue 🧞♂️
What is the metal hydroxide solution formed?
Alkali or acid
Alkali👨🏻🔬
Reactions with halogens
All alkali metals rezct vigorously with halogens forming colourless salts. Some more reactive elements react violently👅
What happens when it reacts and loses electrons
It loses electrons to form positive ions.✊
Only on outer shell it loses
1+ charge ion (Li+)
