If one magnesium atom is to form an ionic bond with another atom, the most compatible possibility would be to find an atom with how many valence
electrons.

after a the power stroke, adp is released, but the cross-bridge formed is still in place. atp then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.

answer; ///progressive relaxation;