Which has the higher reactivity, Calcium or Potassium?
Reactivity may be defined as the ability of an atom or molecule of how easily it has the capacity to react with another atom or molecule and achieve stability. The more reactive an element is the more easily it can achieve stability.
Answer and Explanation:
Potassium is more reactive than Calcium. The reason behind it is because potassium has only one valence electron as compared to Calcium which has 2 valence electrons. More number of electrons means more amount of energy is required by atom to achieve noble gas configuration. Thus, potassium reacts faster by losing one electron and achieves stability.
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from General Studies Science: Help & ReviewChapter 27 / Lesson 45