JEE Main 202624 JanuaryMorning Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 24 January
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Classification of Elements and Periodicity in Properties
JEE Main 2026 · 24 January · Morning Shift · Chemistry · Classification of Elements and Periodicity in Properties
Given below are two statements: Statement I : K>Mg>Al>B is the...
Given below are two statements:
Statement I: is the correct order in terms of metallic character.
Statement II: Atomic radius is always greater than the ionic radius for any element.
In the light of the above statements, choose the correct answer from the options given below
Statement I: is the correct order in terms of metallic character.
Statement II: Atomic radius is always greater than the ionic radius for any element.
In the light of the above statements, choose the correct answer from the options given below
Options
- ABoth Statement I and Statement II are true
- BBoth Statement I and Statement II are false
- CStatement I is false but Statement II is true
- DStatement I is true but Statement II is false
Correct answer
D. Statement I is true but Statement II is false
Step-by-step solution
Statement I: Metallic character decreases from left to right across a period and increases down a group. K (Group 1, Period 4) is the most metallic element among these. Mg (Group 2, Period 3) is less metallic than K. Al (Group 13, Period 3) is less metallic than Mg. B (Group 13, Period 2) is a metalloid with the least metallic character. The order K > Mg > Al > B correctly represents decreasing metallic character. TRUE.
Statement II: Atomic radius compared to ionic radius depends on whether the ion is a cation or anion. For metals forming cations: atomic radius > cationic radius (e.g., Na > Na⁺). However, for nonmetals forming anions: atomic radius < anionic radius (e.g., Cl < Cl⁻). The statement claims atomic radius is ALWAYS greater for ANY element, which is incorrect because anions have larger radii than their parent atoms. FALSE.
Correct answer: Statement I is true but Statement II is false.
Statement II: Atomic radius compared to ionic radius depends on whether the ion is a cation or anion. For metals forming cations: atomic radius > cationic radius (e.g., Na > Na⁺). However, for nonmetals forming anions: atomic radius < anionic radius (e.g., Cl < Cl⁻). The statement claims atomic radius is ALWAYS greater for ANY element, which is incorrect because anions have larger radii than their parent atoms. FALSE.
Correct answer: Statement I is true but Statement II is false.