What does an electron dot diagram show?

The protons and neutrons.

The energy levels of an atom.

The valence electrons.

All of the atom’s electrons.

An electron dot diagram shows the valence electrons of an atom.

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The correct answer from the options you provided is:

The valence electrons.

An electron dot diagram, also known as a Lewis dot diagram, is a way to represent the valence electrons of an atom. It shows the symbol of the element surrounded by dots, each representing one valence electron. Valence electrons are the electrons in the outermost energy level of an atom and are important in determining the chemical behavior of an element. The electron dot diagram helps us identify the number of valence electrons an element has, which is useful in understanding how atoms interact and form chemical bonds with other atoms. So, the correct answer is: The electron dot diagram shows the valence electrons.