Class 9 chemistry Practice Tests
Class 9 Chemistry Online Tests
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The MCQ Both elements of 1st period contain valence electrons in: m shell, n shell, k shell and s shell with "Periodic Table" App Download (Free) for school certificate. Study periodic table and periodicity quiz questions, download Amazon eBook (Free Sample) for online education.
MCQ 1: Both elements of 1st period contain valence electrons in
MCQ 2: In the periodic table, helium is placed at
MCQ 3: The first three periods are
MCQ 4: On basis of electronic configuration the group and period of 95B is
MCQ 5: Nobel gases are present in
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