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  3. Chemistry
  4. The chemical elements are arranged in the order of increasing electronegativities in the sequence

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Q. The chemical elements are arranged in the order of increasing electronegativities in the sequence

UP CPMTUP CPMT 2010Classification of Elements and Periodicity in Properties

Solution:

Electronegativity increases as we move from left to right in a period so phosphorus is more electronegative than silicon and bromine is more electronegative than selenium and electronegativity decreases as we descend the group
$\therefore \,$ Nitrogen is the most electronegative element of the given elements
$\therefore \,$ The observed order is $Si$, $P$, $Se$, $Br$, $N$