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Topic 4 ­ groups in the periodic table

Properties of groups:

Alkali metals are reactive, soft metals with low densities
Transition metals are unreactive and form coloured
compounds
Halogens are reactive non-metals that form coloured vapours
Noble gases are unreactive non-metals

Metallic bonding

Particles in a metal are held together…

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They have high melting points ­ mercury is liquid at room
temperature
Less reactive than alkali metals
They have high densities
Malleable and good conductors of heat and electricity

Group 1 metals - alkali

The group 1 metals show a trend which they increase in
reactivity as one goes down…

Page 3

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Here the lithium fizzes slightly and becomes smaller until it
eventually disappears.
When sodium is added, it melts to form a ball that moves around
the surface. It fizzes rapidly and hydrogen may burn with an orange
flame before it disappears.
When potassium is added, it melts and floats. It…

Page 4

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A displacement reaction is when a reactive metal replaces a less
reactive one from a compound. Like chlorine will displace bromine
as it is more reactive:
Chlorine + sodium bromide sodium chloride + bromine
Cl (g) + 2NaBr (aq) 2NaCl (aq) + Br (aq)
Noble gases
They are non-metals
They…

Page 5

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air. So they made an hypothesis about the composition of air. This
was tested and the noble gases were discovered.
The noble gases have a low boiling point. The boiling points
increase as you go down the group
Noble gases have low densities because they are gases and the
particles…

Comments

Mist

THANK YOUU FOR NOTESS
DO HAVE ANY C1&C3 notes?? :)


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