Chemistry - PERIODIC TABLE Question with Solution | TestHub

The first four elements of Group 15 are Nitrogen (N), Phosphorus (P), Arsenic (As), and Antimony (Sb). Ionization energy decreases down the group ($N>P>As>Sb$), meaning $W=N$, $X=P$, $Y=As$, and $Z=Sb$. Electronegativity also continuously decreases down the group in the same order: $N>P>As>Sb$ ($W>X>Y>Z$). Other properties like atomic radius increase down the group ($W<X<Y<Z$), and electron affinity is highest for Phosphorus ($X>W>Y>Z$).