Question

The order of elements in the periodic table is based on

a. the number of protons in the nucleus.
b. the electric charge of the nucleus.
c. the number of neutrons in the nucleus.
d. atomic mass.

Please select the best answer from the choices provided
A
B
C
D

Answer 1

A. The number of protons

This is also known as the atomic number. While as the number of neutrons and electrons can change, creating isotopes and ions, respectively, the protons do not.

Answer 2

A. number of protons in the nucleus