Relative Atomic Mass Of Sodium



  • The relative atomic mass of an element is also known as the relative atomic weight of an element, or, the atomic weight of an element.

    • A relative atomic mass is a measure of how heavy atoms are. It is the ratio of the average mass per atom of an element from a given sample to 1/12 the mass of a carbon-12 atom. The relative atomic mass in 1 mole of isotopes of sodium atoms is 23 g/mol.

    Sodium: On the periodic table of elements, the chemical element sodium is shown by the symbol Na. Sodium has an atomic number of 11, which means it has 11 protons. Do you want to know how to calculate Relative Atomic Mass? In this education video by The Fuse School, you are going to learn about:- How to calculate Relati.

  • Relative atomic mass is often abbreviated as r.a.m.
  • The relative atomic mass of an element (its atomic weight) is given in the Periodic Table.
  • The relative atomic mass of an element is the weighted average of the masses of the isotopes in the naturally occurring element relative to the mass of an atom of the carbon-12 isotope which is taken to be exactly 12.
    • The atomic mass unit (u) is defined as a mass equivalent to 1/12 of the mass of one atom of carbon-12.

    1 u = 1.66 × 10-27 kg

    We can estmate the the relative atomic mass (atomic weight) of an element E with the naturally occurring isotopes aE, bE, AtomiccE, etc, and with the respective abundances of A%, B%, C% etc,
    relative atomic mass (r.a.m.) = ( A
    100     		× a) + ( B
    100     		× b) + ( C
    100     		× c) + etc
    Mass Given the relative atomic mass (r.a.m.) of an element and the estimated mass of each of its isotopes, we can then estimate the relative abundance of each isotope: let x

    Relative Atomic Mass Of Sodium Fluoride

    = %abundance of isotope-a
    and 100 - x = %abundance of isotope-b

    Atomic Mass Of Sodium 22


    then, let r.a.m = relative atomic mass of the element:

    Relative Atomic Mass Of Sodium Hydroxide

    r.a.m. = ( x
    100     		× mass isotope-a) + ( 100 - x
    100     		× mass isotope-b)

    Relative Atomic Mass Of Sodium Sulphate

    and solve for x

    Relative Atomic Mass Of Sodium Chloride

  • Note that we can measure the mass of each isotope and its abundance using Mass Spectroscopy