Question

What is the atomic mass of manganese?

Answer 1

Hint: We must need to remember that the atomic mass of a component or element is that the average mass of the atoms of a component measured in amu abbreviated as atomic mass unit (it is also referred to as daltons, Da or $u$). The atomic mass may be the weighted average of all of the isotopes of that element, during which the mass of every isotope is multiplied by the abundance of that specific isotope.

Complete step by step answer:
We must know that the manganese chemical symbol is $Mn$ and it’s atomic number is $25$ . The atomic number of manganese $25$ indicates there is $25$ protons and electrons present in the nucleus.
Atomic mass is additionally mentioned as relative atomic mass, but the term mass is more accurate.
Manganese atomic mass is $54.938044u$.
We must know that the manganese is an element that is monoisotopic and its relative atomic mass is decided solely by its isope of ${}^{55}Mn$ . The commision last revised the quality relative atomic mass of manganese in $2017$ supported the newest mass evaluation by IUPAC (International Union of Pure and Applied Chemistry).
${}^{53}Mn$ is an isotope of manganese and is radioactive with a half-life of $3.2$ Ma, too tiny for survival; of a detectable amount of primordial isotope. However ${}^{53}Mn$ has been identified on earth as a cosmic-ray product and as a constituent cloud amounting to approximately one disintegration per minute per gram of manganese in sediment cores like an abundance of $3\times {10}^{-13}$ , much too small affect the quality relative atomic mass.

Note: Not confused with mass number. We must need to remember that an integer (whole number), which is equal to the sum of the number of protons and neutrons (collectively called nucleons) in an atomic nucleus is known as the mass number. In other words, mass number is the sum of the number of nucleons, which is a constituent (proton and neutron) of an atomic nucleus. The symbol for mass number is $A$ .