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© The Author(s) 2015. Published by Science and Education Publishing. Table 1. Mean and standard deviation of difficult level of chemistry concepts S/N TOPICS OR CONCEPTS MEAN STANDARD DEVIATION REMARK 1 Separation of mixture 1.49 0.65 Not Difficult 2 Particulate nature of matter 1.66 0.76 3 Symbols, formulae and equations 1.85 0.74 Difficult 4 Chemical combination 1.67 0.69 5 Gaseous State 1.60 0.70 6 Acids, bases and salts 1.77 0.72 7 Carbon and its Compounds 1.73 8 Organic chemistry 1.87 0.87 9 Periodic tables of element 1.69 10 Structure and energy level of atom 2.33 0.73 11 Quantitative analysis 2.24 0.75 12 Rate of Chemical Reaction 1.72 13 Chemical Equation 1.94 14 Non metals and their compounds 2.15 0.79 15 Thermo chemistry 2.49 16 Metals and their compounds 2.13 17 Applied chemistry 2.52 18 Nuclear chemistry 0.77 19 Astronomical chemistry 2.65 Jack Gladys Uzezi et al. Assessment of Conceptual Difficulties in Chemistry Syllabus of the Nigerian Science Curriculum as Perceived by High School College Students. American Journal of Educational Research, 2017, Vol. 5, No. 7, 710-716. doi:10.12691/education-5-7-3 © The Author(s) 2015. Published by Science and Education Publishing.