The scientific name for a polar bear is ursus maritimus. the scientific name for an american black bear is ursus americanus. which of the following statements is true?

The polar bear is called the Ursus martimus that one is true

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.