# Question Video: Determining the Electric Charge of a Particle from Its Composition of Quarks Chemistry

A composite particle is composed of 2 up quarks and 1 down quark. What is the overall electrical charge of this particle?

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### Video Transcript

A composite particle is composed of two up quarks and one down quark. What is the overall electrical charge of this particle?

A quark is a type of fundamental particle. A fundamental particle is a particle that’s not made of smaller particles. In nature, quarks never exist on their own. They combine to create other larger particles. The composite particle in this question is made of two up quarks and one down quark. The particle that’s made of two up quarks and a down quark is the proton. The overall electrical charge of the proton is positive one.

If we didn’t identify this composite particle as the proton, we can still answer this question. We can calculate the overall electrical charge of the particle using the charges of the quarks. The up quark has a charge of positive two-thirds, and the down quark has a charge of negative one-third. If we add up the charges for the quarks that make up the composite particle, we get positive one. So either way we solve this question, the overall electrical charge of the composite particle is positive one.