# Where Is The Atomic Mass?

## Where do I find the atomic mass?

For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number.

This is because each proton and each neutron weigh one atomic mass unit (amu).

By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom..

## What is the atomic mass of an atom?

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope.

## Is atomic mass the same as atomic weight?

So again, the mnemonic for memorizing the difference between atomic mass and atomic weight is: atomic mass is the mass of an atom, whereas atomic weight is the weighted average of the naturally occurring isotopes.

## What is the atomic number and mass number?

The number of protons determines an element’s atomic number and is used to distinguish one element from another. … Together, the number of protons and the number of neutrons determine an element’s mass number.