Why has JET not been able to get fusion reactions to work?

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?

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?