1. list three locations in the u. s. where you might find shark teeth.
2. what parts of a shark fossilize other than its teeth?
3. describe one shark from the cenozoic era. what does the shark look like?

b is the correct 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.