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an element is a single type of atom in abundance (as in pure copper wire, etc.) therefore, an element cannot change. a compound can be broken down into two elements when another element or compound reacts with the former.

im pretty sure its called a reaction.

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14y ago
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8y ago

This characteristics is called chemical reactivity.
An measure of the reactivity is the electronegativity or the first ionization energy.
In the system of Pauling electronegativity francium is the most reactive metal and fluorine the most reactive nonmetal.

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Q: What is it called when an element will change when it reacts to another element?
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