Atomic Particles Notes

an atom is the smallest particle of an elementthe three smaller subatomic particles that make up an atom are electrons, protons, and neutrons.protons are located in the nucleus along with neutrons. electrons are located outside the nucleus.protons have a positive charge. neutrons have no charge. electrons have a negative charge.protons and electrons are the most dense subatomic particles, neutrons are the lightestpositive is the overall charge of an atomthe relationship of numbers between is that they are the sameproton is the subatomic particle that is related to the atomic number of an elementthe number of protons and electrons are equala valence electron is an electron that is in the highest occupied energy level of an atomto complete the first shell with electrons you need 2to complete the second shell, you can have up to 8