1. (a) Define the term isotope.
....................................................................................................
(1)
(b) Define relative atomic mass
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...................................................................................................(2)
(c) Define relative isotopic mass.
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...................................................................................................(2)
(d) The diagram shows part of the mass spectrum for chloroethane,
C2H5Cl.
What ions are responsible for the peaks at m/e 66 and
64, and 29 and 28?
66: .....................................................................................................................
64: ......................................................................................................................
29: .....................................................................................................................
28: ....................................................................................................................(4)
(e) Define the term first ionisation energy.
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..............................................................................................................................
...........................................................................................................................(2)
(f) The graph shows a plot of lg(ionisation energy) vs number of the electron removed for sodium. Explain the form of this graph in terms of the electron structure of sodium.
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...................................................................................................................................
................................................................................................................................(3)
(g) Give the electronic configurations showing electrons in boxes for atoms of argon and iron then the following ions. (4 marks)
Ar...................................................................................................................................
Fe...................................................................................................................................
TOTAL 18 marks