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Stonebridge Natural Science Pathway
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Stonebridge Natural Science Pathway atomic structure worksheet.
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Atomic Structure Assignment.1. Complete the following table.
Name Symbol Mass Charge Location
Proton p+ 1 +1 Nucleus
n0
Neutron 1 0 Nucleus
Electron e- 1/1836 -1 Orbitals around
the nucleus
2. This question is aimed at understanding the sub-atomic particles present in atoms.
14 16 32 27 39
Given the following 7 N 8 O 16 S 13 Al 19 K complete the table below.
Particle Protons Neutrons Electrons Symbol
Sulphur atom 16 16 16 S
Potassium atom 19 20 19 K
Oxygen atom 8 8 8 O
Aluminium ion 13 14 13 Al+3
Nitride ion 7 8 10 N-3
Oxide ion 8 8 10 O2-
, 3. Complete the paragraph regarding isotopes by inserting keywords from the list below into
the shaded boxes.
physical relative atomic mass radioactive mass
element chemically nuclei neutrons
Isotopes are atoms of the element With different numbers of mass.
same
They Chemically In exactly the same way, but physical
react their
properties are different due to atoms of different isotopes having neutrons
different
Sometimes the nuclei of isotopes are unstable, which results in the
element
becoming radioactive Nearly all elements exist in isotopic form, but often
there
Is one main isotope. Accordingly, Relative atomic mass is very close to the
the mass
number of that particular element.
4. The table below contains information about several isotopes. Use the information given
to fill in the blanks. Assume all atoms are neutral.
No. of
Isotope Nuclear Atomic Mass No. of No. of
Electron
Name Symbol Number Number Protons Neutrons
s
40 40 Ca
calcium 20 40 20 28 20
20
55 55 Mn
Manganese 25 55 25 30 25
25
18 18 O
Oxygen 8 18 8 10 8
8
197
197
Gold
79 Au 79 197 79 118 79
5. The table below contains information about several ions. Use the information given to fill
in the blanks.
No. of
Element Ion Atomic Mass No. of No. of
Electron
Name Symbol Number Number Protons Neutrons
s
Fluorine F 9 19 9 10 9
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