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  4. Find out the electronegativity difference between two atoms when the percentage ionic character is 19.5 %.

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Q. Find out the electronegativity difference between two atoms when the percentage ionic character is $19.5 \%$.

Classification of Elements and Periodicity in Properties

Solution:

$19.5=16 \Delta+3.5 \Delta^{2}$
$\therefore \Delta=1$