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end of year chemistry
topic 2 periodic table
the periodic table
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Created by
Sophie b
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Cards (4)
groups
number of
electrons
in
outermost
shell
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periods
Number of
electron shells
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orginial organisation
in
atomic weight
as thats all they knew of at the time before discovering
pen
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what did mendeleev do
he left
gaps
for elements that were
undiscovered
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