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put the steps of the light reactions in the correct order.

1. atp uses energy to add a phosphate to adp forming atp

2. water is split to replace the electrons in photosystem ii

3. light energy is transferred to a chlorophyll reaction center where electrons become energized.

4. electrons from photosystem i become energized and escape photosystem i and move down the second electron transport chain.

5. at the end of the electron transport chain, the energized electrons and an h+ ion are used to reduce nadp+ to nadph

6. electrons move to an electron acceptor in the electron transport chain and electrons in photosystem ii are replaced by the splitting of a water molecule

7. electrons move down the electron transport chain, releasing energy

8. a protein in the electron transport chain, pumps h+ ions from the stroma into the thylakoid space

9. electrons from the electron transport chain close to photosystem ii replace the elctrons lost in photosystem i

10. photosystem ii receives photons in the form of light energy

11. h+ ions flow down the concentration gradient through a channel in atp synthase, releasing energy in the process