Model the single electron in the valence shell of the Na atom as a fermion in an infinite square well of length a. If the ground state of this particle is E= h²/(8a²m) and the ground state of two N
a) 16 times the ground state energy of a single particle
b) 8 times the ground state energy of a single particle
c) 4 times the ground state energy of a single particle
d) The same as the ground state energy of a single particle
