The first-ionization energies of four consecutive elements in Period 2 are listed below.
W: 736 kJ mol⁻¹
X: 801 kJ mol⁻¹
Y: 1003 kJ mol⁻¹
Z: 1681 kJ mol⁻¹
Assuming the values follow the typical periodic trend for Period 2, which element (W, X, Y, or Z) is most likely fluorine?
a) Y
b) W
c) Z
d) X