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Chemistry
C1
Physical and chemical changes
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Physical changes
no
new
substances
are made
the change is
easily reversed
Chemical changes
new
substances
are
made
change
isnt
easily
reversed
In a
chemical
change, particles
separate
from one another and then
join
together
in
different
ways to before.
This diagram shows what happens to
iron
and sulfur particles in a
chemical
reaction to form
iron
: