In stage 2 of photosynthesis, nadp+ becomes nadph by adding an h+. where does the h+ come from?

Can someone me with questions 12 and 13 plz.

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?