During a photoelectron spectrum measurement of an unknown element, the detector saturated when recording the valence electrons. The instrument notes indicate that the height of the lowest-binding-energy peak is only 50 % of its true value. The recorded peaks, from highest to lowest binding energy, have relative heights 2, 2, 6, 2, 3 (affected). Assuming the stated 50 % reduction is accurate, which element is most consistent with the actual spectrum?
a) Phosphorus,Z=15
b) Argon,Z=18
c) Potassium,Z=19
d) Chlorine,Z=17