reactivity
impetus for which a chemical substance undergoes a chemical reaction, either by itself or with other materials, with an overall release of energy
en-US/ˌɹiˌækˈtɪvəti/
en-GB/ɹɪəkˈtɪvɪtɪ/
impetus for which a chemical substance undergoes a chemical reaction, either by itself or with other materials, with an overall release of energy