The digestive system changes the food we eat into usable and unusable materials. where do unusable materials go until disposal? to the liver or to the pancreas or to the large intestine or to the small intestine

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.