Elements in the modern version of the periodic table are arranged in order of increasing ________.
A)oxidation number
B)atomic mass
C)average atomic mass
D)atomic number
E)number of isotopes

Question

Quizplus · Accepted Answer

The modern periodic table is arranged in increasing order of atomic number, which is the number of protons in the nucleus of an atom. This arrangement helps to group elements with similar properties into columns (groups) and helps predict the behavior of new or unknown elements.

Elements in the Modern Version of the Periodic Table Are