A substance is tested in a lab. It is found to maintain a unique shape and is a good conductor of electricity. If it is made up of electrons, protons, and neutrons, what state of matter is this substance most likely to be?

A solid keeps a definite, unique shape, unlike a liquid or gas, which take the shape of their container. Some solids, such as metals, conduct electricity well. Being made of electrons, protons, and neutrons does not by itself make the substance plasma; the clue about maintaining its shape points to a solid.

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