Protons matter that only recently has been

Protons can be found in the nucleus of every atom. While originally it had been thought that protons were a fundamental particle, recent research has shown that protons are made of quarks. This lesson will cover the properties of the proton.

Definition

A proton is a subatomic particle with a positive electric charge.

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Protons are found in the nucleus of every atom. In fact, the number of protons in each atom is it’s atomic number.

The atomic number is equal to the number of protons in the nucleus
atomic

Until recently, the proton was considered a fundamental particle.

However, new technologies have led to the discovery that the proton is actually composed of smaller particles called quarks. A quark is a fundamental particle of matter that only recently has been discovered. There are six known types of quarks; up, down, strange, charm, top and bottom. A proton is composed of two up quarks and one down quark.

Quark makeup of a proton
Terms Definitions
Proton a subatomic particle with a positive electric charge; composed of smaller particles called quarks
Quark a fundamental particle of matter that only recently has been discovered
6 types of quarks up, down, strange, charm, top and bottom
Proton charge +1 elementary charge denoted by the letter e; originated in 1874 by George Stoney
Coulomb a type of unit of electric charge; equivalent of one ampere being steadily transported per one second
Statcoulomb a unit of electric charge in the centimeter-gram-second system of units (cgs) and Gaussian Units
Mass one proton is 1.67 x 10-27 kg

Learning Outcomes

Finishing this lesson allows you to:

  • Define protons and quarks
  • Recall how protons can form
  • Outline the charge and mass of a proton
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