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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?

Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?

What is the amount of energy for a photon that has a 125 cm wavelength