Relating energy in fusion reaction to Einstein’s equation (73.9%)
Writing and balancing of nuclear equations from statements (68.6%)
Relating alpha emission to position of elements in Periodic Table (60.8%)
Giving correct reasons why solid radioactive wastes are not disposed of by composting (60.8%)
Determining the values of atomic and mass numbers in nuclear equations (59.3%)
Although there were general reductions in the widespread of the difficulties in all the concepts (ie. the number of
students experiencing learning difficulties reduced in all cases) the proportions of students with these difficulties
remained high. This indicates that these concepts are really challenging to students. This is most probably because
the concepts are very high in the hierarchy of theoretical concepts which Chemistry students have to learn. There are
many theoretical concepts and sub-concepts which must be mastered before students are able to effectively grapple
with these highly abstract theoretical concepts that are on top of the hierarchy.