Step-by-step explanation:
Fe has 6 valence shell electrons and therefore, it can form 2 bonds (keep in mind that Fe does not obey the octet rule). Na (obeys octet rule) can form another bond with 1 valence shell electron.
Answer:
The student attempts to form one bond with Fe and 3 bonds with Na, whereas this does not coincide with the valence shell electrons of the atoms.