Question

Which of the following statements concerning the periodic table isincorrect?
A. Mendeleev received most of the credit for the early developmentof the periodic table.
B. The elements in a given group or family have similar chemicalproperties.
C. Mendeleev left spaces in his periodic table for undiscoveredelements.
D. All the elements are arranged in order of increasing atomicweight.
E. The chemical characteristics of the elements are periodicfunctions of their atomic numbers.