The age of the ocean floor is greatest in subduction zones or

a) closest to deep-ocean trenches

b) farthest from the mid-ocean ridges

c) closest to the central valley of the mid-ocean ridge

d) farthest from deep-ocean trenches

c should be the answer

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.