IGCSE O Level Chemistry Practice Tests
IGCSE O Level Chemistry Online Tests
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MCQ 1: In the periodic table, the period number indicates the number of
MCQ 2: Chemical properties of an element are largely derived through the
MCQ 3: What is correct about electrons?
MCQ 4: Mass of an electron is
MCQ 5: Helium (He) is not an inert gas because it has
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