The Question is from neet-chemistry classification-of-elements-and-periodicity-in-prop electro-negativity-electro-positivity-valency, and it was created by the author Mr. S M HUSSAIN

Question

Which of the following statements regarding the trends in electronegativity and electropositivity across a period and down a group is INCORRECT?

Mr. S M HUSSAIN · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Periodic Trends in Electronegativity and Electropositivity
 **Related Topics**: Atomic radius, ionization energy, electron affinity
 **Prerequisites**: Understanding of atomic structure and periodic table organization.
## SOLUTION PATHWAY
**Given Information**:
Four statements regarding trends of electronegativity and electropositivity across a period and down a group.
**Method & Steps**:
1. Analyze each statement individually to determine its correctness.
   Reasoning: Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. Electropositivity is the tendency of an atom to lose electrons and form positive ions.  These properties are influenced by atomic size and nuclear charge.
2. Evaluate statement A: Electronegativity generally increases across a period (due to increasing nuclear charge and decreasing atomic size) and decreases down a group (due to increasing atomic size and shielding effect).
   Working: This statement is correct. 
3. Evaluate statement B: Electropositivity generally increases across a period and decreases down a group.
   Working: This statement is incorrect. Electropositivity generally *decreases* across a period (due to increasing nuclear charge making it harder to lose electrons) and *increases* down a group (due to increasing atomic size and shielding effect making it easier to lose electrons).
4. Evaluate statement C: Smaller atoms tend to have higher electronegativity.
   Working: This statement is correct. Smaller atoms have a stronger pull on electrons due to the closer proximity to the nucleus.
5. Evaluate statement D: Larger atoms tend to have higher electropositivity.
   Working: This statement is correct. Larger atoms have electrons further from the nucleus, making them easier to lose.
   Result: Statement B is the incorrect statement.
   Verification:  The trends in electronegativity and electropositivity are well-established in chemistry.  The opposite trend stated in option B is incorrect.
## OPTION ANALYSIS
A ✓: Correctly describes the trend of electronegativity.
B :x: Incorrectly describes the trend of electropositivity. Electropositivity decreases across a period and increases down a group.
C :x: Correctly describes the relationship between atomic size and electronegativity.
D :x: Correctly describes the relationship between atomic size and electropositivity.
## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing electronegativity and electropositivity: Remember that electronegativity refers to attracting electrons, while electropositivity refers to losing electrons.
  2.Misunderstanding the impact of shielding effect: The shielding effect by inner electrons reduces the effective nuclear charge experienced by valence electrons.
 **Quick Tips**:
  1.Use the periodic table as a visual aid to understand these trends.
  2.Remember the general trends: Electronegativity increases across and up, electropositivity increases down and to the left.

Mr. S M HUSSAIN · Answer

Electronegativity generally increases across a period and decreases down a group.

Mr. S M HUSSAIN · Answer

The correct Option is "Electropositivity generally increases across a period and decreases down a group."

Mr. S M HUSSAIN · Answer

Smaller atoms tend to have higher electronegativity.

Mr. S M HUSSAIN · Answer

Larger atoms tend to have higher electropositivity.

NEET Chemistry Classification of Elements and Periodicity in Properties Electro Negativity, Electro Positivity, Valency MCQs

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