Particles of matter that make up protons and neutrons are

Quarks

Explanation:

Quarks are the smallest constituents of protons and neutrons. In particular, the proton and the neutron are a combination of two types of quarks:

- Quark up: it has a charge of

- Quark down: it has a charge of

Both the proton and the neutron consists of 3 quarks:

- The proton consists of 2 quarks up and 1 quark down, so that its charge is

- The neutron consists of 1 quark up and 2 quarks down, so that its charge is

change tension

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