Class 9 chemistry Practice Tests
Class 9 Chemistry Online Tests
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MCQ 1: Across the period the atomic size decreases due to
MCQ 2: Chemical properties depend upon
MCQ 3: The energy required to remove an electron from the outermost shell is called
MCQ 4: As we go from top to bottom in a group the shielding effect
MCQ 5: The ability of an atom to attract electrons towards itself is called
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