reactivity
nounUK /ˌriːækˈtɪvəti/
US /ˌriækˈtɪvəti/
Reactivity is how easily something changes when it meets something else.
The scientist tested the reactivity of the metal by putting it in water.
OTHER MEANINGS
2. In chemistry, the tendency of a substance to undergo a chemical reaction.
Sodium has high reactivity, so it must be stored in oil.
3. In psychology, the tendency to react to a stimulus or situation.
The child's reactivity to loud noises made him cry.
4. In biology, the ability of a cell or tissue to respond to a stimulus.
The doctor checked the reactivity of the patient's pupils.
5. In electronics, the property of a circuit component that responds to changes in current or voltage.
The engineer measured the reactivity of the coil in the circuit.