NEET · Chemistry —

Classification of Elements and Periodicity in Properties appeared 2 times across 1 year — 4.4% of Chemistry. This question is from Periodic Trends and Radii.

Year 2024 Total
Questions 2 2
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Identify the incorrect statement from the following:

Solution & Explanation

Related Formula
Atomic/Ionic Radii Order: Mg > Al > Mg²⁺ > Al³⁺
Core Logic

Comparing species: Largest atomic species is Mg (not Al, since radius decreases across period). Smallest species is Al³⁺ (highest effective nuclear charge among isoelectronic ions). Thus, statement (2) is incorrect.

Step 1: Conclusion

Incorrect statement is (2).

Pattern Recognition

Atomic size decreases across a period (Mg > Al). Isoelectronic cations size decreases with higher positive charge (Mg²⁺ > Al³⁺).

Chapter Mix

Class 11 Chemistry: Classification of Elements and Periodicity in Properties

Reference Study Guides

Classification Of Elements And Periodicity In Properties

More Classification of Elements and Periodicity in Properties Previous-Year Questions

Q80 neet_2024_05_may_morning Metallic Character Trends
The correct order of increasing metallic character of Na, Be, P, Mg and Si is:
  • A. (1) P < Si < Be < Mg < Na
  • B. (2) Be < Si < P < Mg < Na
  • C. (3) P < Si < Na < Mg < Be
  • D. (4) P < Mg < Be < Si < Na

Solution

Related Formula
Metallic character ∝ 1Electronegativity
Core Logic

Electronegativity values on Pauling scale: Na = 0.9, Mg = 1.2, Be = 1.5, Si = 1.8, P = 2.1

Metallic character increases as electronegativity decreases:

P < Si < Be < Mg < Na
Step 1: Conclusion

Increasing metallic character order is P < Si < Be < Mg < Na (Option 1).

Pattern Recognition

Metallic character increases down a group and decreases across a period.

Chapter Mix

Class 11 Chemistry: Classification of Elements and Periodicity in Properties

More Classification of Elements and Periodicity in Properties Questions — neet_2024_05_may_morning

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JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)