Which of the following is a molecular compound that contains five atoms per molecule?

Question

germanium tetrabromide
dinitrogen monoxide
dinitrogen pentoxide
nitrogen diselenide

please explain. I am having a very hard time comprehending this stuff

thanks

Answer 1

What's wrong with writing the formula and counting the atoms?
GeBr4. I count 5; 1 Ge + 4 Br = 5 atoms/molecule.

N2O--3 atoms/molecule

N2O5 = ?
NS2 = ?