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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

Respuesta :

Answer:

e. high energy electrons dropping back into a lower-energy shell

Explanation:

  • As the fire is a major source of the energy that heats up the iron and the flow of the electrically charged particles that form in the iron bar will lead to the increase of the energy levels and thus become hot and when they are kept away they tend to lower don the energy.

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