Relative Mass Calculator

Calculate the relative atomic mass of an atom based on its atomic number and mass number

Input Parameters

Calculation Results

Calculation Formula

Relative Atomic Mass = Mass Number / Atomic Number

Where:
Atomic Number (Z): Number of protons in the nucleus
Mass Number (A): Sum of protons and neutrons in the nucleus

Result

Relative Atomic Mass:

Relative Mass Calculator Usage Guide

Learn how to use the Relative Mass Calculator and understand its working principles

How to Use This Calculator

  1. Enter the Atomic Number (Z) of the element. This is the number of protons in the nucleus of an atom.
  2. Enter the Mass Number (A) of the isotope. This is the total number of protons and neutrons in the nucleus.
  3. Click the Calculate button to compute the relative atomic mass.
  4. The result will be displayed as the relative atomic mass, which is a dimensionless quantity.

Understanding Relative Atomic Mass

The relative atomic mass of an element is the average mass of its naturally occurring isotopes, weighted by their abundance. However, for a single isotope, it can be directly calculated by dividing the mass number by the atomic number.

For example, Carbon-12 has an atomic number of 6 and a mass number of 12. Its relative atomic mass is 12 / 6 = 2.0000.

Applications

This calculator is useful for:

  • Chemistry students learning about atomic structure
  • Scientists calculating properties of isotopes
  • Educational purposes to demonstrate atomic mass concepts