2. Moseley used his new version of the periodic table to predict four elements that had
not previously been discovered. How might have using atomic numbers allowed
Moseley to predict the existence of these four elements?
A. Adding energy could change a known element into an unknown element.
B. Gaps in the whole number pattern of atomic numbers might indicate
undiscovered elements.
C. There has to be an element that corresponds to every possible x-ray pattern.
D. Discovery of unexpected x-ray patterns indicate additional elements are in
a sample.
