In the periodic table, atoms are arranged in order of
A) increasing atomic mass.
B) increasing atomic number.
C) physical properties.
D) periodicity.
E) chemical reactivities.

Question

Quizplus · Accepted Answer

The arrangement of the elements in the periodic table is based on increasing atomic number, which corresponds to the number of protons in the nucleus of each atom. Atomic mass, physical properties, periodicity, and chemical reactivities are all related to the atomic number of each element, but they are not used as the primary criteria for organizing the elements in the periodic table.

In the Periodic Table, Atoms Are Arranged in Order of