Which would make it hard to draw a conclusion from the results of an experiment?
O A. You used two manipulated variables.
O B. You used a controlled experiment.
O C. There is one responding variable.
O D. There is a trend in the data.

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?