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C2 - Bonding, Structure and Properties of Matter
Formation of Ions
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Ion are
charged particles
- they can be single or groups of atoms
when
metals
form ions they
lose
electrons from their outer shell to form
positive
ions
when
non-metals
form ions they
gain
electrons into their outer shell to form
negative
ions
the number of electrons
lost
or
gained
is the same as the
charge
on the ions
Groups
1
,
2
,
6
and
7
most likely to form
ions
group
1
and
2
are
metals
and they
lose
electrons to form
positive
ions
group
6
and
7
are
non-metals
and they
gain
electrons to form
negative
ions
elements in the same group all have the number of
outer electrons