The operational definition of reactivity of alkali metals with oxygen is the brightness of the flame produced when an alkali metal is burned in oxygen gas. The brighter the flame, the more reactive the metal. Alkali metals burn brightly in oxygen gas, with brighter flames indicating higher reactivity.

1. Operational Definition of Reactivity of
Alkali Metals with Oxygen
State the Operational Definition of
Reactivity of Group 1 elements.
Quick tip:
Action, Observation, Relate
• Alkali metals is burnt in oxygen gas
• Brightness of flame
• The brighter the flame, the more reactive
the metal is
Operational Definition of reactivity is
the brightness of flame produced when
alkali metals is burnt in oxygen gas. The
brighter the flame, the more reactive the
metal is