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year 1
module 2
2.1.1 atomic structures and isotopes
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Cards (7)
isotopes are atoms of the same
element
with different numbers of
neutrons
and different
masses
atomic number: no. of
protons
in the nucleus
mass number: no. of
particles
(
protons
and
neutrons
) in the nucleus
relative charges for subatomic particles
proton +
1
neutron
0
electron
-1
ions are charged because they have
unbalanced
numbers of
protons
and
electrons
and so the charges no longer
cancel
each other out
relative isotopic mass: the
mass
of an atom of an
isotope
compared with
1/12th
of the
mass
of an atom of carbon
12
relative atomic mass: the
weighted
mean
mass
of an atom of an element compared with
1/12th
of the mass of an atom of carbon
12
recall the names of the following ions
NO3-
nitrate
CO3
2-
carbonate
SO4
2-
sulfate
OH-
hydroxide
NH4
+
ammonium
Zn
2+
zinc ion
Ag
+
silver ion