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C1 pages 108-110 (group 1 elements (reactions with water (they react…
C1 pages 108-110
group 1 elements
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Includes lithium, sodium, potassium, rubidium, caesium and francium
they all have one electron in their outer shell which makes them very reactive and gives them similar properties.
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reactions with water
lithium, sodium and potassium float and move around the surface, fizzing furiously.
they react vigorously
the lower down the group (the more reactive) an alkali metal is, the more violent the reaction
they produce hydrogen
the amount of energy given out when they react increases down the group. for potassium and below there is enough energy to ignite hydrogen.
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reactions with chlorine
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as you go down the group reactivity increases so therefore the reaction with chlorine gets more vigorous.
reactions with oxygen
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group 1 metals react with oxygen to form a metal oxide, different types of oxide will form depending on the group 1 metal.
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group 0 elements
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all inert, colourless gases (at room temp)
include the elements helium, neon and argon
they all have eight electrons in their outer energy level, apart from helium which has two, giving them a full outer shell. as their outer shell is energetically stable they don't need to give up or gain electrons to become more stable. this means they are more or less inert (they don't react with much at all).
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