Which is NOT an example of a characteristic you might use to classify a bird? beak size and color
feather colors
year of its birth
leg type

year of its birth

b) the inside picture would look at a very high temperature in a very low ph

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.