The columns of the periodic table divide atoms by their ________.
A)number of valence electrons
B)atomic mass
C)number of protons
D)number of neutrons

Question

Quizplus · Accepted Answer

The columns of the periodic table, also known as groups, are organized by the number of valence electrons in the atoms of the elements. Elements in the same group have similar chemical properties due to having the same number of valence electrons.

The Columns of the Periodic Table Divide Atoms by Their