Question

The CORRECT order of electronegativity is:

• A. ( {Al>Si>P>S} )
• B. ( {Al>S>Si>P} )
• C. ( {S>Si>Al>P} )
• D. ( {S>P>Si>Al} )

Hint:

Electronegativity increases across a period (left to right) and decreases down a group (top to bottom). For elements in the same group or period, consult the Pauling scale for accurate values.

Answer 1

The Correct Option is D

Step 1: Understanding electronegativity.

Electronegativity is the tendency of an atom to attract electrons towards itself in a chemical bond. The Pauling scale is the most commonly used scale for electronegativity. Electronegativity generally increases across a period and decreases down a group in the periodic table.

Step 2: Electronegativity values of the given elements.

• Sulfur (\( S \)) = 2.58
• Phosphorus (\( P \)) = 2.19
• Silicon (\( Si \)) = 1.90
• Aluminum (\( Al \)) = 1.61

Step 3: Arranging in decreasing order.

Based on the electronegativity values:

\[ S > P > Si > Al \] Step 4: Verifying the options.

Option (D) matches the correct order.