Charge! - A Free Application For Windows
What is a charge? Charge is a property of matter that determines how the elementary particles in a substance will respond to an electric field. There are two types of charges, positive and negative. Electrons carry the negative charge and protons carry the positive charge. Matter containing more electrons than protons has a negative charge. Positively and negatively charged matter contain the opposite number of protons and electrons. Having an even number of protons and electrons makes matter neutrally charged.
Electric charge is the conserved property of subatomic particles. It determines the strength of electromagnetic interaction, and it is the source of a force. Charged matter repels matter with a similar charge, while neutral matter has no charge. In quantum chromodynamics, color charge is also considered a form of charge. Charge is used in many fields of science, including physics and chemistry. It is also used to denote the generator of continuous symmetry within a system.
The electrical charge of a large sample is defined as the sum of all atoms' net charges, taking into account their polarity. In fact, massive samples can have significant numbers of elementary charges. The unit of electrical charge in the International System of Units is the coulomb. One coulomb is equal to 6.24 x 1018 elementary charges. Therefore, real-world objects can contain many coulombs of charge.