Death Finds a Way: A Janie Riley Mystery by Lorine McGinnis Schulze. Janie Riley is an avid genealogist with a habit of stumbling on to dead bodies. She and her husband head to Salt Lake City Utah to research Janie's elusive 4th great-grandmother. But her search into the past leads her to a dark secret.
A: The most abundant isotope of magnesium has 12 neutrons; it is therefore, technically known as magnesium-24. Calculating the number of neutrons in an isotope of any element involves subtracting that element's atomic number from its atomic weight. Magnesium's number is 12, and its weight is just over 24.
The molar mass of magnesium is 24.305 grams per mole. This means that, given a sample of magnesium where the number of atoms in the sample is equivalent to Avogadro's constant, the mass of the sample is exactly 24.305 grams. Continue Reading. Magnesium is the 12th element in the periodic table and is classified as an alkaline earth metal. It is one of the eight most abundant elements in the Earth's crust and one of the nine most abundant elements in the universe overall.