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Doctors Medicines MCQs Q&A

  1. Remains same
  2. Decreases
  3. Increases
  4. Either increases or decreases
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1 Answers

Option 2 : Decreases

Explanation:

Cation:

  • Cation is defined as a positively charged which is formed when an element loses an electron.
  • If the cation is formed then the size of the positively charged atom ( i.e. cation ) decreases because the number of electrons initially presented in the neutral atom gets decreased by one.
  • Then, the force of attraction implying by the nucleus gets increased on the valence electrons ( i.e. the electrons in the outermost shell ) and thus holding the valence electrons tighter than before.
  • If u remove one electron the cation gets +1 charge on it. If u further remove another electron, then the cation gets +2 charge and so on.
  • However, the number of max. positive charge for an atom depends on the nature of the particular element.
  • For Example: All Alkali Metals easily lose 1 e- to form +1 cation While Alkaline Earth Metal easily loses 2e- to acquire +2 charge.
  • Size of cation is lower than neutral atom because as a particular atom loses electron, no of proton become more than no of electron and attraction forces increases so radius decreases.

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