What happens as you go down Group 1, the alkali metals?
They become more reactive because the outer electron is more easily lost as it's further from the nucleus. They also have lower melting and boiling points
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What do alkali metals have?
Low density
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What first three in the group are less dense than water?
Lithium, sodium and potassium- also a couple more like rubidium and caesium
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What do alkali metals all have?
One outer electron- they are very reactive and they all have similar properties
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The alkali metals form what?
Ionic compounds with non-metals
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Why are alkali metals so keen to lose their outer electron?
To form a 1+ ion- there is no way they'd consider sharing so no covalent bonding
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What do alkali metals form?
Ionic bonds- they produce white compounds that dissolve in water to form colourless solutions
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Reactions with water produces what?
Hydrogen gas
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What happens when lithium, sodium and potassium are put in water?
They react very vigorously- They float and move around the surface and fizz furiously
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The three main alkali metals produce what?
Hydrogen- potassium gets hot enough to ignite it
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A lighted splint will indicate hydrogen by producing what?
A squeaky pop- as the H2 ignites
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Hydroxides are formed and are dissolved to give what?
Alkaline solutions
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Other cards in this set
Card 2
Front
What do alkali metals have?
Back
Low density
Card 3
Front
What first three in the group are less dense than water?
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