structure was a triumph to science in general. In the late 18th century and the
beginning of the 19th century, the discovery of the subatomic particles, the
electron and the proton and the neutron shed light on the particles that
constitute the atoms. This task is related to the atomic structure studies.
1) Discuss how
are elements, compounds, neutrons,
protons, atomic number ,mass number and isotopes are related under structure
and bonding (15
should include the interrelationship between the structure and bonding in
elements all in detail)
the element selenium. Samples of natural selenium contain 6 stable isotopes. In
terms of atomic structure; explain what theses isotopes have in common and how
they differ from each other. (15
should include all the details about the 6 isotopes)
peroxide has both a higher viscosity and a higher boiling temperature than
water. Discuss some factors about
this behavior with the help of principles of atomic structure.
contain at least 5 reasons) (10
layer refers to a region of Earth's stratosphere that absorbs most of the Sun's
UV radiation. It contains high concentrations of ozone (O3) relative to other
parts of the atmosphere, although it is still very small relative to other
gases in the stratosphere. The ozone layer is mainly found in the lower portion
of the stratosphere, from approximately 20 to 30 kilometers above Earth.
1) Some of the
oxygen in the atmosphere is in the form of ozone (O3). Scientist believe that
chlorine radicals are destroying ozone.Collect information about chlorine
radicals and chlorine molecule. (15 marks)
should include details about chlorine radicals and chlorine molecule in detail.
2) Discuss the
principal steps in stratospheric ozone depletion caused by human activities and
collect information on how the emissions from human activities lead to ozone
(Information should include at least 10
factors all in detail) (15
periodic table is arranged into blocks of elements based on their electronic configuration. There are different
types of elements available in the periodic table.
1) From the
periodic table choose any element and describe the types of bonding orbitals
and bonds that comprise C-C and C=C bonds. (15
should include details of both single and double bond)
2) Discuss the desirable material
properties of that chosen element. (15
(Report should contain at least 10 material
task should contain minimum of 500 words
and not exceed 1000 words.
evaluated on the basis of collection of literature, provision of Technical
supported with appropriate photos and references in the prescribed format]