The repeating properties in each row of the periodic table, as observed by Mendeleev and others, reflect the repeating electron configurations in subsequent rows. The valence are also the highest-energy electrons in an atom, and most likely to participate in a reaction.įor these reasons, atoms with similar electron configurations generally behave in similar ways. That fact makes the valence electrons more likely to interact with other atoms. The valence electrons are the outermost electrons in an atom they are closest to the surface of an atom. One atom may donate electrons to another atoms. In a reaction, one atom may accept electrons from another atom.
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