How does a particle become negative or positive?

Answer 1

A particle becomes negative by gaining extra electrons, and becomes positive by losing electrons. Atoms do this as they wish to reach a stable state by either gaining a full outer shell or reaching 8 electrons on the out shell. Remember all elements want to be a noble element, so they can be stable.

Answer 2

A particle has equal numbers of protons (positive) and electrons (negative). When a particular electron is added to complete the octate of the particle then it becomes negatively charged. And when electron(s) is/are removed from it to complete the octate then the particle become positively charged.

Answer 3

a particle becomes positive when it loses electrons that have negative charge and becomes negative when it gans them.the more electrons it gives or takes the more negative or positive it will become.they do this to gt a full outer shell so you can know which particles will lose and which will gain by looking at its electron configuration.for example oxygen has 6 electrons on its outermost shell so its easier to gain 2 electrons than lose 6 to become stable

Answer 4

A particle becomes negative when it has excess electrons and positive when it has a deficiency of electrons. When we rub two different substances together, some electrons are transferred from one to another and the donor becomes positive and the receiver of electrons becomes negative.