This give atoms a stable configuration like
that of the nearest?

13 protons and 14 neutrons.  this also means that the amount of electrons also is 13 because electrons have the same amount as protons..the atomic number means the amount of protons (which effectively tells you the electrons) the atomic mass, tells you the amount of protons and neutrons in the nucleus.hope this . 

B. the larger and heavier the box, the more force you must use when pushing

Bis the answero  i hope this  works