1. Tardigrade
  2. Question
  3. Chemistry
  4. Identify the least stable ion amongst the following.

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Q. Identify the least stable ion amongst the following.

IIT JEEIIT JEE 2002Classification of Elements and Periodicity in Properties

Solution:

$Be^-$ is the least stable ion. $Be (Is^22s^2)$ has stable electronic configuration, addition of electron decreases stability.