Atoms have a Centra Nucleus with Electrons Moving Round It.
Tiny nucleus but males up most of the mass of atom. Contains + charged protons and neutral neutrons. Overaal +tively charged.
Rest of atom mostly empty. -tively electrons move around outside but have no mass.
Proton- mass is 1. Charge is +1.
Neutron- mass is 1.Charge is 0.
Electron- mass is 1/2000. Charge is -1.
Build-up of Static caused by friction.
when two insulting materials are rubbed 2gether, electons will be scraped offand dumped of other. Will leave a + charged and -charged.Only electrons can move, not protons.Which way the two electrons transferred depends on two materials involved.