An atom of sodium has a larger mass than an atom of neon. how is this possible when neon has so many more valance electrons?

The mass is made up of protons and neutrons, the valence electrons only determine stability, not mass

This  focuses on  the entrepreneurial leadership of these  growth  firms.   governmentministers can play a critical  role  in  fostering  enterprise and innovation. their  role  is to direct thegovernment  departments and agencies to  focus  on the problem and develop effective policies.