/// <summary>
/// Get integer MassNumber (isotope value) for an atom
/// </summary>
/// <param name="atom"></param>
/// <returns></returns>
public static int GetMassNumber(IAtom atom)
{
if (atom.getMassNumber() == null)
{
return(0);
}
else
{
return(atom.getMassNumber().intValue());
}
}
