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Chemistry - Term 1 Yr 10
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Cards (9)
Define polyatomic ion
A
tightly bound group
of
atoms
that
behaves
as a
unit
and has a
positive
or
negative charge.
Define
ion


An
atom
or
molecule
that has
gained
or
lost
one or more
electrons
and is
charged.
Define
mass
number

The total number of
protons
and
neutrons
in the
nucleus
of an atom.
Define atomic number
The number of
protons
in the
nucleus
of an atom of an
element.
Define compound
A
substance
that is
made up
of
atoms
of
different elements joined together
by
chemical bonds
in a
fixed ratio.
Define element
A
substance
that is
made up
of
one type
of
atom
,
defined
by its
atomic number.
Define molecule
A
neutral
group of
non-metal
atoms
covalently
bonded.
Define atom
The
smallest
particle of an
element
that
retains
its identity in a
chemical reaction.
Define precipitate
A
precipitate
is the
insoluble
product
which forms when
two
soluble
salts
react in
solution
