What is the relationship between the atomic number and the atomic mass of an element?

Answer 1

Generally, the larger the atomic number, the larger the atomic mass. There are a few exceptions however; such as Nickel, which has less mass than Cobalt, Iodine, which has lesser mass than Tellurium, and so on

Answer 2

Atomic number is the number of protons. Atomic mass is the number of protons plus the number of neutrons. Therefore, atomic mass is always greater than or equal to the atomic number. Generally, the number of neutrons and protons is about equal in an atom, so the atomic mass is (roughly) double the atomic number.

Also, most elements have more than 1 stable isotope so the atomic mass given in a periodic table is the average of the weights of those isotopes in the percentage each isotope makes of of the total on earth.

Answer 3

The atomic mass minus the atomic number tells the number of neutrons.

The atomic number is the number of protons.

Answer 4

Atomic number represents the number of protons
Atomic weight is the total mass, including the neutrons. Weight minus number equals the number of neuitrons.