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Classification Of Elements And Periodicity In Properties Questions
25 Practice QuestionsStart Practicing Now
- [Hard]If first ionization enthalpy values are Na = 496 kJ mol^-1, Mg = 738 kJ mol^-1 and Al = 578 kJ mol^-1, which statement is correct?...
- [Hard]In period 3, nature of highest oxides changes from Na2O to Cl2O7 as:...
- [Medium]Identify the correct trend of metallic character among period-3 elements Na, Mg, Al and Si:...
- [Medium]Why does chlorine have a more negative electron gain enthalpy than fluorine?...
- [Easy]The highest oxidation state shown by a p-block element is generally equal to:...
- [Easy]Which statement best explains the basis of the modern periodic table?...
- [Medium]An isoelectronic series contains O2-, F-, Na+ and Mg2+. Which species has the smallest ionic radius?...
- [Medium]Among Li, Be, B and C, the first ionization enthalpy is lowest for:...
- [Easy]Which order of electronegativity is correct for period-2 elements B, C, N and O?...
- [Easy]Across period 3 from Na to Cl, the atomic radius generally decreases because:...
- [Easy]As electronegativity increases across a period, metallic character generally:...
- [Medium]Which element has the most exothermic (most negative) electron affinity?...
- [Hard]First ionization energy order (highest to lowest):...
- [Easy]Which element shows anomalous electron configuration due to stability of half-filled d-subshell?...
- [Medium]Lanthanide contraction chiefly causes which pair of 4d/5d elements to have similar radii?...
- [Hard]In isoelectronic series O2−, F−, Na+, Mg2+, Al3+ ionic radius order (largest to smallest):...
- [Medium]Diagonal relationship observed between Li and Mg due to:...
- [Medium]Effective nuclear charge (Zeff) generally:...
- [Medium]Which order shows increasing metallic character: B, C, N, O?...
- [Medium]Which statement is correct regarding ionic vs atomic radius?...
- [Easy]Acidic character of period 3 oxides increases in which direction?...
- [Medium]Which subshell provides poorest shielding?...
- [Easy]Which order correctly represents increasing atomic radius (period 2 elements)?...
- [Hard]A large jump between 2nd and 3rd ionization energies suggests element has how many valence electrons?...
- [Easy]Correct decreasing order of electronegativity (Pauling) among: N, O, F, C?...