Question

The symbol of an atom that represents the element with its atomic number as the subscript and mass number as the superscript​

Answer 1

Answer:

A subscript before the symbol would be the atomic number. That would be already defined by the symbol of the element itself, but it could be useful in following nuclear reactions like beta decays. The superscript in front of the symbol would be the atomic mass. A subscript behind the symbols could mean the number of neutrons in the isotope, again useful in following nuclear reactions, OR it could be the number of atoms in a molecule or cluster. A superscript following the symbol would indicate ionic charge, such as 2- or 3+. A zero would be superfluous unless you were indicating valence in a molecular structure, such as for Fe in Fe(CO)5.