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Fill in the blank :


______ ________ are the electrons of an atom that participate in chemical reactions. These electrons determine the basis for the periodic properties of an element.


Sagot :

Answer:

The number of electrons in the outermost shell of a particular atom determines its reactivity, or tendency to form chemical bonds with other atoms. This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons

Explanation:

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