10. Using the same table from question 9, calculate the average for each student. Then use this average to calculate the error for each student. Also calculate the percent error for each student.

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?