sentence: Electrons can move from one object to another when touched.
sentences_before: An object can be described as 'negatively charged' if there are more electrons than protons in an object, or 'positively charged' when there are more protons than electrons.
sentences_after: They may be attracted to another object with opposite charge, or repelled when they both have the same charge. When an object is 'grounded', electrons from the charged object go into the ground, making the object neutral. This is what lightning conductors do.
concept_name: electron
headings: Electron Description
categories: Basic physics ideas Elementary particles