- more reactive down the group
- lots of shells, outer e- rlly far from the nucleus
-nucleus can't hold on to, weaker attraction, loses it more easily
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properties of non metals
brittle, dull, low mp and bp, lower density
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properties of transition metals
can form multiple ions, often coloured, good catalysts
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alkali metal+H20=>
metal hydroxide+hydrogen
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alkali metal+O2=>
metal oxide
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Where are alkali metals stored and why?
In oil, to prevent reactions w. oxygen and water from the air= ignite/ flame/ burn, and can ignite at room temp.
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Group 7, what are the reactivity trends?
The reactivity decreases
-outer shell gets further from nucleus
-attractive force needed to pull an e- from another atom gets weaker
-if can't attract e-s to complete it's outer shell, then can't react
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Features of noble gases
colourless, inert, non-flammable, bp increase down the group
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