Here's why:
* Atoms are neutral: Atoms normally have an equal number of protons (positively charged) and electrons (negatively charged), making them electrically neutral.
* Electrons are easier to move: Electrons, which orbit the nucleus, are much less tightly bound to the atom than protons. This means they are easier to gain or lose.
* Gaining or losing electrons: When an object gains electrons, it becomes negatively charged. When an object loses electrons, it becomes positively charged.
In summary: While both protons and electrons contribute to an object's charge, it's the movement of electrons that is responsible for changes in charge.
