Question

The chemical elements are arranged in the order of increasing electronegativities

in the sequence

1) Si, P, Se, Br, Cl, O 2) Si, P, Br, Se, Cl, O

3) P, Si, Br, Se, Cl, O 4) Se, Si, P, Br, Cl, O​

Answer 1

But when we move from left to right in a period then due to decrease in size of the atoms there will be increase in electronegativity of the atoms. Thus, we can conclude that K, Ca, Sc list of elements is arranged in order of increasing electronegativity.26-

Answer 2

Explanation:

Electronegativity increases as we move from left to right in a period so phosphours is more electronegative than silicon and bromine is more electronegative than selenium and electronegativity decreases as we descend the group.

∴ Nitrogen is the most electronegative element of the given elements.

∴ The observed order is Si, P, Se, Br, N.