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Atom contains:

Protons which are Positively charged

Electrons which are Negatively charged

Neutrons which are Neutral


In an atom, the number of protons is equal to the number of electrons .

So the positive and negative charges are balanced out


Ions are formed when atoms lose or gain electrons .


In formation of ions;


  • Cation : When an atom loses an electron

The negative charge reduces .

Thus it becomes positively charged - Cation, because;

The number of positively charged protons becomes more than negatively charged electrons



  • Anion : When atom gains an electron ,

The negative charge increases .

Thus it becomes negatively charged - Anion, because;

The number of negatively charged electrons becomes more than positively charged protons

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo