A photon has a wavelength of 3.8 × 10^-7 meters, which is between visible and ultraviolet. Calculate the energy of this photon.

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?

Identify the electromagnets with poles that are reversed from the electromagnet shown above

Which suspect most likely committed the robbery and how do you know