A piece of metal is composed of atoms. Each atom in the metal contains 29 protons. How is the metal classified?

The piece of metal composed of 29 protons in its atom is classified as a transition metal.

TRANSITION METAL:

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A transition metal

Explanation:

The metal is classified as a transition metal or transition element.

In particular, this atom is Copper it has an atomic number of 29 which we know by the number of protons.

The number of protons in an atom is the same as the atomic number.

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