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reactivity

noun

  1. impetus for which a chemical substance undergoes a chemical reaction, either by itself or with other materials, with an overall release of energy
  2. measure of the criticality of a nuclear chain reacting material
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Wiktionary

Pronunciation: /rɪˈakˈtɪvɪti/

noun

Etymology: Etymology tree English react Proto-Indo-European *-wós Proto-Indo-European *-iHwósder. Latin -īvus Old French -ifbor. Middle English -yf English -ive English reactive Proto-Indo-European *-teh₂ Proto-Indo-European *-ts Proto-Indo-European *-teh₂ts Latin -itāsder. Old French -itebor. Middle English -ite English -ity English reactivity From reactive + -ity.

  1. responsiveness to stimulation
  2. relative susceptibility to chemical reaction