If you heat up a bar of iron in a fire until it glows, the light emitted from the iron is caused by ... ?
a. an increase in the atomic number of the iron atoms
b. a reorganization of protons and neutrons in the atomic nucleus
c. a chemical reaction with oxygen free radicals in the air
d. residual fire that is stuck to the metal
e. high energy electrons dropping back into a lower-energy shell
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Home » Geography » If you heat up a bar of iron in a fire until it glows, the light emitted from the iron is caused by ... ? a. an increase in the atomic number of the iron atoms b. a reorganization of protons and neutrons in the atomic nucleus c.