A simplified spectrum for magnesium (Z = 12) shows a single valence peak at 7.5 units…
CHEMISTRY · Single correct · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties
Problem
A simplified spectrum for magnesium (Z = 12) shows a single valence peak at 7.5 units corresponding to two 3s electrons. Which change would most likely be observed in the valence region of the spectrum for aluminum (Z = 13)?
(a) The 3s peak remains at the same binding energy but doubles in height.
(b) A new peak appears at slightly lower binding energy than the 3s peak and represents one electron, while the 3s peak keeps its original height and shifts slightly to higher binding energy.
(c) A new peak appears at higher binding energy than the 3s peak and represents one electron, while the 3s peak retains its original position and height.
(d) The 3s peak decreases in height to one electron, and a new peak of two electrons appears at slightly lower binding energy.