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

Considering the elements F, Cl, O, and S, arrange them in increasing order of their electronegativity.

Mr. S M HUSSAIN · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Electronegativity
 **Related Topics**: Periodic trends, atomic structure
 **Prerequisites**: Understanding of electronegativity and periodic table trends.
## SOLUTION PATHWAY
**Given Information**:
  Elements: F, Cl, O, S
**Method & Steps**:
 1. Understand Electronegativity:
  Reasoning: Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. It generally increases across a period (from left to right) and decreases down a group (from top to bottom) in the periodic table.
  Formula/Rule:  No specific formula, but understanding periodic trends is crucial.
 2. Locate elements in the periodic table:
  Working: F, Cl, O, and S are all nonmetals.  Fluorine (F) is in Period 2, Group 17; Chlorine (Cl) is in Period 3, Group 17; Oxygen (O) is in Period 2, Group 16; Sulfur (S) is in Period 3, Group 16.
  Key Point:  Elements in the same group have similar chemical properties, but electronegativity decreases down the group. Elements in the same period show an increase in electronegativity from left to right.
 3. Arrange in increasing order of electronegativity:
  Result: S < Cl < O < F
  Verification: Sulfur (S) is below oxygen (O) in Group 16, so S has lower electronegativity than O. Chlorine (Cl) is below fluorine (F) in Group 17, so Cl has lower electronegativity than F.  Across the period, electronegativity increases, so O is less electronegative than F, and Cl is less electronegative than F.
 ## OPTION ANALYSIS
A :x: Incorrect order.
B :x: Incorrect order.
C :x: Incorrect order.
D ✓: Correct order reflecting the periodic trends in electronegativity. 
 ## LEARNING AIDS
 **Common Mistakes**:
  1. [Error 1]: Confusing trends – remembering that electronegativity increases across a period and decreases down a group is vital.  Mixing these up leads to incorrect ordering.
  How to avoid: Use the periodic table as a visual aid and practice with examples.
  2. [Error 2]: Neglecting the periodic table – attempting to order elements without considering their position in the periodic table is unreliable.
  How to avoid: Always refer to the periodic table to determine relative electronegativities.
 **Quick Tips**:
  1. [Helpful shortcut]: Remember the general trend: electronegativity increases from bottom left to top right of the periodic table.
  2. [Memory aid]: Use mnemonics or flashcards to memorize the relative electronegativities of common elements.

Mr. S M HUSSAIN · Answer

F < O < Cl < S

Mr. S M HUSSAIN · Answer

S < Cl < F < O

Mr. S M HUSSAIN · Answer

Cl < S < O < F

Mr. S M HUSSAIN · Answer

The correct Option is "S < Cl < O < F"

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

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