So seven balance electrons for o, and we have one electron in the balanced electron of one s for H. So we have all together eight electrons, eight balanced electrons that we will have to place around our atoms. So let's begin by placing our oxygen and H adjacent to one another. So we have eight electrons. Let's begin by drawing a sigma oracovalent bond between oxygen and nitrogen. So once we draw this line, that basically means that one electron is being donated by H and one electron is being donated by o. Now, this means that all the orbitals, meaning this one s orbital, is completely filled for H. Because before, when H is by itself, it has one electron in its one s shell.