Chemistry · Oct / Nov 2016 · Paper 22 · Question A6
5070
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The question as text
A6 Sodium and rubidium are alkali metals.
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A6(a)[1]
electrons move (throughout the structure)/mobile electrons (1)
1
A6(b)[2]
One mark each for any two of:
decrease in melting point down the group, Or Reverse Argument (ORA) /decrease in boiling point down the group ORA (1)increase in density down the group ORAincrease in reactivity down the group ORAdecrease in hardness down the group ORA 2A6(c)[2]
rubidium hydroxide (1)
hydrogen (1)
2
A6(d)[1]
sodium more reactive (than titanium) ORA/sodium higher in reactivity series (than titanium) ORA (1)
1 Total: 6
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