9. Which two subatomic particles make up the nucleus of an atom?

There are three main subatomic particles.

Proton (p+) - Located within the nucleus.

Neutron (n) - Located within the nucleus.

These two subatomic particles above are located in the nucleus.

There is also the Electron (e-) which orbits around the nucleus.

Have a awesome night✨Explanation:

As the other answers have stated, protons and neutrons usually make up the nucleus of an atom. Sometimes, however, there are other particles, also composed of three quarks (called hardrons) that can temporarily replace a proton or neutron. These particles can have the same net charge as a proton or neutron, so from the outside the atom would behave the same, barring the very small increase in mass (protons and neutrons are the lightest and most stable baryons). Muons and Taus can also replace electrons.

they are known to reach a speed of 21 miles per hour

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

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