Question

The periodic table is based on an element's

A. atomic number.
B. atomic mass.
C. molecular size.
D. molecular mass.

Answer 1

All of the elements in the periodic table are ordered based on their atomic number (left to right, top to bottom, from low to high).

Answer 2

Look at the periodic table and try to discover yourself. Google will help you.

Answer 3

atomic number .(left to right, top to bottom, from low to high).& electronic configuration.