How are mass number and atomic number related?

Answer 1

If there is only 1 isotope then they are equal. Many naturally found elements have various isotopes (different numbers of neutrons in the nucleus). Each isotope has a diffent mass, so the measured atomic weight is an average.

Answer 2

The mass number is the number of the Atomic Mass. The atomic mass is the mass of the atom of the element. There is no difference between the two, except mass number is referring to the number, while atomic mass is referring to the atom's mass in general, which is also expressed by a number. Basically, both terms mean the exact same thing.

Answer 3

Atomic mass is the sum of the mass of all particles found in an atom. All particles (protons, neutrons and electrons) have a certain mass, and adding it together will give you the atomic mass of that particular element.

Therefore, most of the atomic mass is found in the nucleus of the atom, because:

A. There are many more protons and neutrons than electrons in most atoms

B. Protons and neutrons have a much greater atomic mass that electrons.

Answer 4

Basically the mass number(A) is all the protons and neutrons in the nucleus, the number of protons in the nucleus is equal to the atomic number(Z)

eg. A nucleus contains 8 protons, hence its atomic number is 8

and by extension, Mass number(A)= number of protons or Atomic Number(Z) + the neutrons(n)

Answer 5

mass number= protons + neutrons

average atomic mass is the average mass of that element because there are isotopes. isotopes means same atomic number but different mass number.

basically they both are same.

Answer 6

1. Atomic Number is the number of Protons: P
2. Atomic Mass Number is the sum of the numbers of Protons and Neutrons: Z = P + N

Answer 7

The atomic mass number is the sum of the atomic number, the number of protons, and the number of neutrons in the nucleus of the atom.