In the Gold foil experiment of Geiger and Marsden, that paved the way for
Rutherford’s model of an atom, ~ 1.00% of the α-particles were found to
deflect at angles > 50º.
If one mole of α-particles were bombarded on the gold foil, compute the number of α-particles that would deflect at angles less than 500.
Show diagramatically the electron distributions in a sodium atom and a
sodium ion and also give their atomic number.
In what way is the Rutherford’s atomic model different from that of
Thomson’s atomic model?
Enlist the conclusions drawn by Rutherford from his α-ray scattering
experiment.
An element X has a mass number 4 and atomic number 2. Write the valency
of this element?
. Fill in the blanks in the following statements
(a) Rutherford’s α-particle scattering experiment led to the discovery of
the ———
(b) Isotopes have same ———but different———.
(c) Neon and chlorine have atomic numbers 10 and 17 respectively. Their
valencies will be———and———respectively.
(d) The electronic configuration of silicon is ———and that of sulphur
is ———.
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