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The correct statement(s) regarding the periodic properties of elements is(are)
The correct statement(s) regarding the periodic properties of elements is(are)
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Remember key exceptions and trends:
- IE across period: General increase, but exceptions due to orbital stability (e.g., B \textless Be, O \textless N). For 2nd IE, the electronic configuration of $X^+$ is critical.
- Ionic radii (isoelectronic): Decrease with increasing nuclear charge.
- Density (Group 1): K is less dense than Na.
- Bond energies: Small halogens (F$_2$) have weaker bonds due to lone pair repulsion. H-H is surprisingly strong.
- IE across period: General increase, but exceptions due to orbital stability (e.g., B \textless Be, O \textless N). For 2nd IE, the electronic configuration of $X^+$ is critical.
- Ionic radii (isoelectronic): Decrease with increasing nuclear charge.
- Density (Group 1): K is less dense than Na.
- Bond energies: Small halogens (F$_2$) have weaker bonds due to lone pair repulsion. H-H is surprisingly strong.
Updated On: May 20, 2026
- Second ionization enthalpy of carbon atom is less than that of boron atom.
- Increasing order of ionic radii: Al$^{3+}$ \textless Mg$^{2+}$ \textless Na$^+$
- Under identical conditions, in solid state, the density of potassium metal is more than density of sodium metal.
- The H–H bond is weaker than F–F bond.
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The Correct Option is A
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