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Chemistry - Periodic Classification Of Elements

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1. Arrange the following elements in order of their increasing ionization energies 0, S, Se, Te, Po. (NTSE Delhi, Stage-I, 2012-13)

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2. I n the periodic table, the ionisation potential in a group____________________from top to bottom. (NTSE Andhra Pradesh, Stage-I, 2012-13)

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3. The electronic configuration of Potassium is ..... (NTSE Andhra Pradesh, Stage-I, 2012-13)

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4. Most electronegative element is (NTSE Andhra Pradesh, Stage-I, 2012-13)

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5. Of more than 114 elements known so far, __ are metals. (NTSE Mizoram, Stage-I, 2012-13)

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Periodic Classification Of Elements