Which is the fundamental particle of an atom that can be displaced when atoms rub against each other or they undergo chemical reactions with other atoms. Give reason?

Which is the fundamental particle of an atom that can be displaced whe

1.	Which is the fundamental particle of an atom that can be displaced when atoms rub against each other or they undergo chemical reactions with other atoms. Give reason?
Answer» ELECTRONS are those PARTICLES. Explanation: Because electrons lie outside the ATOM in shells. The force of attraction exerted by the NUCLEUS on the electrons is less. That is why they're displaced when atoms rub against each other. And also when they undergo chemical REACTIONS.