Mn Atomic Mass

Posted on  by admin

Isotopes: There are known 25 isotopes of manganese ranging from Mn-44 to Mn-67 and Mn-69. The only stable isotope is Mn-55. The only stable isotope is Mn-55. The next most stable isotope is Mn-53 with a half-life of 3.74 x 10 6 years.

Atomic mass of mn

What is the atomic number of Mn?

  1. Chemical elements listed by atomic mass The elements of the periodic table sorted by atomic mass. Click on any element's name for further information on chemical properties, environmental data or health effects. This list contains the 118 elements of chemistry.
  2. The isotopes of manganese range in atomic weight from 44 u (44 Mn) to 69 u (69 Mn). The primary decay mode before the most abundant stable isotope, 55 Mn, is electron capture and the primary mode after is beta decay.
Mn protons

1 Answer


Mn, or Manganese, has the atomic number of 25. We can find this on many standard periodic tables (such as the one at

Mass number is essentially the number of protons in the element. Remember that protons are what define an element. 25 protons is the atomic number of Manganese, and 12 is the atomic number of Magnesium.

The element to the left will always have an atomic number one less, and the one to the right will always be one more.

In fact, the periodic table is in numerical order by Atomic Number. They'll always be whole numbers, 1-118.


Related questions

Atomic Mass and Nuclear Binding Energy for Mn-55 (Manganese)


Mn Atomic Mass

This document is part of the Supplement containing the complete sets of data of Subvolume A `Nuclei with Z = 1 - 54' of Volume 22 `Nuclear Binding Energies and Atomic Masses' of Landolt-Börnstein - Group I `Elementary Particles, Nuclei and Atoms'. It provides atomic mass, mass excess, nuclear binding energy, nucleon separation energies, Q-values, and nucleon residual interaction parameters for atomic nuclei of the isotope Mn-55 (Manganese, atomic number Z = 25, mass number A = 55).

Pub Date:

Mn Element Atomic Mass


Atomic Mass For Mn


Mn Atomic Mass And Mass Number


Atomic Mass Definition Easy

  • atomic mass;
  • mass excess;
  • nuclear binding energy;
  • nucleon separation energy;
  • Q-value;
  • nucleon residual interaction parameter