Diagnosing the Diagnostics

. . . but this agreement breaks down for radicals, complex molecules and homonuclear molecules. Using them interchangeably under such circumstances can lead in misleading description of nature and properties of the molecules . . . In lower level, students usually assume that compounds containing toxic elements like cadmium, mercury and lead are toxic too! In the same level, many believe that all metallic atoms are hard and all non metals are soft (Tsaparlis, 2002). On the other hand senior high school students and even university freshmen were found to have certain misconceptions on the difference between chemical and physical change (Jensen, 1998) . . .This implies that diagnostic tests like multiple choice items and two-tier tests are less efficient in exactly figuring out the extent of students misconceptions. As a result such tests are not potential enough to discriminate misconception from lack of knowledge

Autorentext

The researcher was born on June 14th, 1984 in Assela ,Ethiopia. He earned his B.Ed and M.Ed degree respectively in the year 2006 and 2009 in Chemistry education from Haramaya University. Now he is teaching in Fitche College of Teachers Education, Addis Ababa/Ethiopia. He also published two of his distinguished research works and inquiries.