Which of the following would has a -1/3 charge?

down quark <my answer
hadron
up quark
electron

right

The correct answer is the down quark. The down quark has a charge of -1/3.

The particle that has a charge of -1/3 is the down quark. To determine this, we need to understand the charges of each particle mentioned and their properties.

1. Down quark: The down quark is one of the six types (or flavors) of quarks, which are elementary particles and fundamental constituents of matter. The down quark has an electric charge of -1/3. It is the second lightest quark and is commonly found in protons and neutrons.

2. Hadron: A hadron is a composite particle made up of quarks. Protons and neutrons are examples of hadrons. They are formed from a combination of two or three quarks. While hadrons can contain down quarks, the overall charge of a hadron will depend on the specific combination of quarks it consists of. Therefore, we cannot determine the charge of a hadron without additional information.

3. Up quark: The up quark is another type of quark and has an electric charge of +2/3. It is the lightest of the quarks and is also commonly found in protons and neutrons.

4. Electron: The electron is a fundamental particle that carries a charge of -1. It is not directly related to quarks or hadrons.

Based on this information, the particle with a charge of -1/3 is the down quark.